The purpose of this study is to evaluate whether the efficacy of JNJ-757 combined with nivolumab is better than the efficacy of nivolumab monotherapy for participants with mesothelin-positive relapsed/refractory Stage IIIB or Stage IV adenocarcinoma of the lung. The open-label study comprises of two parts i.e. Phase 1b (safety run-in) and Phase 2. Phase1b consists of 1 arm whereas Phase 2 is randomized into 2 groups i.e. Group A and Group B.