Kei is a trans man who longs for a “normal” life in his rural Japanese hometown. But his Canadian partner pushes for them to move to Tokyo, where they can live openly and freely. When Kei abandons an important job interview to help an elderly hot spring owner, he’s invited to enter the men’s side for the first time. The healing waters grow troubled when an unexpected guest arrives on the other side of the wall, challenging Kei’s sense of identity and murky notions of belonging.