Yurie followed in her husband's footsteps and chose to live as a fisherman. She lived at a fishing port with her only son, Daiki, but the rough-tempered fishermen sarcastically said that she couldn't be a fisherman with her thin, white hands. Daiki secretly had feelings for the beautiful, smiling Yurie. However, one day, on a broken-down boat, Yurie was raped by the fishermen, and when Daiki found out, he did something he should never have done. With nowhere to go, mother and son set sail on a forbidden boat into the vast ocean...