Inclusion Criteria:

          -  Age >= 18 years

          -  Confirmed recurrent or metastatic non-small cell carcinoma of the lung of any
             histology for which there is no curative treatment option

          -  Measurable disease based on RECIST 1.1

          -  Patients must have received standard of care chemotherapy and/or immunotherapy. No
             limits to prior lines of therapy. Prior PD-1 and/or PD-L1 directed therapies are
             permitted

          -  Patients with adenocarcinoma and known actionable mutations with FDA-approved
             treatment options must have received all approved and standard of care treatment
             options (ie osimertinib for EGFR, alectinib for ALK, etc). Mutational testing is not
             required for patients with squamous cell non-small cell lung carcinoma

          -  Eastern Cooperative Oncology Group (ECOG) performance status of 0-2

          -  Absolute neutrophil count (ANC) >= 1,500/mcL

          -  Platelets >=100,000/mcL

          -  Serum creatinine =< 1.5 X upper limit of normal (ULN) OR measured or calculated
             creatinine clearance (glomerular filtration rate [GFR] can also be used in place of
             creatinine or creatinine clearance [CrCl]) >= 60 mL/min for subject with creatinine
             levels > 1.5 X institutional ULN

          -  Serum total bilirubin =< 1.5 X ULN OR direct bilirubin =< ULN for subjects with total
             bilirubin levels > 1.5 ULN

          -  Aspartate aminotransferase (AST) (serum glutamic-oxaloacetic transaminase [SGOT]) and
             alanine aminotransferase (ALT) (serum glutamate pyruvate transaminase [SGPT]) =< 2.5 X
             ULN OR =< 5 X ULN for subjects with liver metastases

          -  Albumin >= 2.5 mg/dL

          -  International normalized ratio (INR) or prothrombin time (PT) =< 1.5 X ULN unless
             subject is receiving anticoagulant therapy as long as PT or partial thromboplastin
             time (PTT) is within therapeutic range of intended use of anticoagulants

          -  Activated partial thromboplastin time (aPTT) =< 1.5 X ULN unless subject is receiving
             anticoagulant therapy as long as PT or PTT is within therapeutic range of intended use
             of anticoagulants

          -  Anticipated life expectancy of >= 3 months

          -  Willing to comply with study procedures

          -  Female subjects of childbearing potential must be willing to use an adequate method of
             contraception, for the course of the study through 120 days after the last dose of
             study medication

          -  Female subject of childbearing potential should have a negative urine or serum
             pregnancy within 72 hours prior to receiving the first dose of study medication. If
             the urine test is positive or cannot be confirmed as negative, a serum pregnancy test
             will be required

          -  Female subjects of childbearing potential should be willing to use 2 methods of birth
             control or be surgically sterile, or abstain from heterosexual activity for the course
             of the study through 5 months days after the last dose of study medication. Subjects
             should agree to ongoing pregnancy testing during the course of the study and after the
             end of study therapy. Female subjects of childbearing potential are those who have not
             been surgically sterilized or have not been free from menses for > 1 year

          -  Male subjects should agree to use an adequate method of contraception starting with
             the first dose of study therapy through 7 months after the last dose of study therapy.
             Males must refrain from donating sperm during study participation and for 7 months
             after the last dose of study medication

          -  Be willing and able to understand and sign the written informed consent document

          -  Ability to swallow and retain oral medication

        Exclusion Criteria:

          -  Is currently participating and receiving study therapy or has participated in a study
             of an investigational agent and received study therapy or used an investigational
             device within 4 weeks of the first dose of treatment

          -  Has active autoimmune disease, including myasthenic syndrome, which has required
             systemic treatment in the past 2 years (i.e. with use of disease modifying agents,
             corticosteroids or immunosuppressive drugs). Replacement therapy (eg, thyroxine,
             insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary
             insufficiency, etc.) is not considered a form of systemic treatment

          -  Has a diagnosis of immunodeficiency or is receiving systemic steroid therapy or any
             other form of immunosuppressive therapy within 7 days prior to the first dose of trial
             treatment

          -  Cirrhosis (Child-Pugh B or worse) or cirrhosis with history of hepatic encephalopathy
             or clinically meaningful ascites resulting from cirrhosis. Clinically meaningful
             ascites is defined as ascites from cirrhosis requiring diuretics or paracentesis

          -  Untreated central nervous system (CNS) metastases. Patients with treated brain
             metastases are eligible if they were clinically stable with regard to neurologic
             function, off steroids after cranial irradiation (whole brain radiation therapy, focal
             radiation therapy, and stereotactic radiosurgery) ending at least 2 weeks prior to
             randomization, or after surgical resection performed at least 28 days prior to
             randomization. The patient must have no evidence of grade >= 1 CNS hemorrhage based on
             pretreatment magnetic resonance imaging (MRI) or IV contrast computed tomography (CT)
             scan (performed within screening window)

          -  Pregnancy or breastfeeding

          -  Has a history or current evidence of any condition, therapy, or laboratory abnormality
             that might confound the results of the trial, interfere with the subject's
             participation for the full duration of the trial, or is not in the best interest of
             the subject to participate, in the opinion of the treating investigator

          -  Any patient who has experienced an unacceptable toxicity on prior checkpoint inhibitor
             therapy as detailed below:

               -  >= grade 3 adverse events (AE) related to checkpoint inhibitor

               -  Ongoing >= grade 2 immune-related AE associated with checkpoint inhibitor with
                  the exception of endocrine toxicities as detailed below

               -  CNS, ocular or cardiac AE of any grade related to checkpoint inhibitor

                    -  NOTE: Patients with a prior or ongoing endocrine AE are permitted to enroll
                       if they are stably maintained on appropriate replacement therapy and are
                       asymptomatic