It's 1945, and the world is in the grip of war. Hideki lives with his family on the island of Okinawa, near Japan. When WWII crashes onto his shores, Hideki is drafted into the Blood and Iron Student Corps to fight for the Japanese army. He is handed a grenade and a set of instructions. Ray, a young American Marine, has just landed on Okinawa. This is Ray's first-ever battle, and he doesn't know what to expect. The choices they make in a single instant will change everything.