Chiko and Shunka visit Shunka's summer home by the beach. It becomes clear that Shunka is obviously disturbed by a past experience at the home, but follows through with the trip regardless. Eventually Shunka reveals that she had blamed herself for her own twin sister's death because she was not able to stop her from drowning. Once the two arrive back home, the "White-haired Devil" exploits the fears of people close to Chiko to control them...