It is the Meiji era. Satoko, who is said to have little timeleft to live, was kidnapped and brought to the island of prostitutes.

To get Shinpei the assassin on her side, she makes a boldproposal to marry him! But with Shinpeis abnormal approach to love, she findsherself trapped in an even more precarious situation

The two hatch a plan for Satoko to disguise herself as aprostitute to flee the island, but Shinpei refuses to let any man lay a fingeron her: I will be the one to protect you…

While Shinpei’s affection is slowly swaying Satokosfeelings for the man, her guilt about their fake engagement begins to surfaceas Shinpei starts to pick up on her behaviour