Kazusa Ozora’s father died under mysterious circumstances. Now, Kazusa makes his living tracking down the identities of unidentified deceased persons, known in Japan as “kōryo shibōnin.” His partner? A suspicious-looking director of a children’s care home. Together, the unlikely duo seeks to uncover the lives of those whom even the police have given up on identifying—using their heads, their feet, and their hearts to follow the faint traces left behind. But life stories are never simple. And it seems the two aren’t searching just for names… A gripping human suspense drama that exposes the personal tales hidden behind every nameless death.