After a routine visit in the middle of a storm, Dia is killed by his therapist, and he is plunged into limbo and greeted by a wandering spirit who tells him he only has 90 seconds to find his decaying body and gain control of it before he is reborn as a mosquito. Back in the physical world, Dia finds his therapist dead, his body seemingly living on its own, and himself now in the middle of a large-scale extermination hunt between all wandering spirits.