For the first time in fifteen years, sisters Eiko and Misato return to the solitary island where they were born and raised. Once there, some men from the village greet them, and they’re reunited with their childhood friend, Shizuka. However, Shizuka is treated like a servant by them, being used as the men's plaything. Eiko and Misato try to get her off the island, but all doesn't go as planned…