As one of the last two living witnesses to a mysterious gangland massacre, former yakuza grunt “Isshin” has found safety—thanks to the police’s insistence—at a Buddhist temple as a newly initiated monk. As his grueling daily life of training continues, Isshin finds himself growing closer with his monastic peers bit by bit... But no amount of solidarity is going to get rid of his sense that he is a fish out of water, or change the fact that a deadly shark is still hunting him!