Baseball player-turned-insurance salesman Byung-woo (Ryoo Seung-bum) is seen as the cocky ace of his company until one of his clients commits suicide. The police suspect him of aiding and abetting the suicide, which almost jeopardizes Byung-woo's career. Anxious to ensure it won't happen again, he gets in touch with his previous clients. Particularly those who seem the type to commit suicide.