The giant monster Raiga returns, rising in Atami Harbor and attacking the city. A second Kaiju, Ohga, soon joins the chaos, and the two monsters clash, destroying large sections of the city.

A male corpse is discovered with a smashed face and burned hands. Strangely, the cause of death is determined to be strangulation. When Detective Kaoru Utsumi attempts to corroborate the victim’s ex-wife’s alibi she discovers the mysterious neighbor and only a few small clues to help her disprove a seemingly "airtight" alibi...