A documentary anime retelling the shipwreck of the freight boat Tsushima Maru, which was carrying 836 schoolchildren home in July 1944 when it was attacked and sunk by an American submarine. Produced by the surviving family members of the Tsushima Maru.

A noir action whodunit with Kobayashi his usual jaunty self as the smart aleck private eye whose missing person search soon becomes a murder case. Nightclub-managing, drug-dealing gangster Uchida is the prime suspect in the case until he commits suicide. Kobayashi then discovers evidence that points to the doctor sibling of an innocent girl. The climax in a rural snowy locale is suspenseful and well-staged.