Based upon a manga created by Tatsuhiko Yamagami, the story is embeded in a previous port community Uobuka, where 6 previous crooks were sent out to live there by the government, with the intention of re-socialising them. Other than minority who find out about the task, the general townsfolk has no suggestion of the former convicts' identities. Tsukisue is the positive and also effective community authorities put in charge of the program. As he gradually finds out about their past, a body is uncovered.