A series of deaths occurred after falling from the roof of the bank. Among the dead were happy female employees who were in love, as well as a young man who declared, "I will never commit suicide." An actress who hanged herself after leaving behind a large number of potted plants, a bank robber dressed as Santa Claus, a Buddhist altar shop owner and a ramen shop owner competing to buy a luxury car... Under the famous "Running Youth" billboard, seemingly unrelated people are connected by mysterious cases. Can detective Mitarai Aoi see through the truth and find the hidden murderer?
