Kindaichi steps into a hospital where the murders won't stop, and the closed-door logic gets claustrophobic fast. The special trades the series' usual high school intrigue for something colder, more suffocating, where every hallway could hide the next body. One hour to solve it all, no safety net, no room to breathe between revelations.

Kindaichi is called on to investigate when a series of murders takes place inside a hospital. The one-hour mystery special aired during a month-long break in the television series, falling between episodes 23 and 24, and it sets his detective work against the backdrop of a medical facility where the killings keep coming.