Shinsuke (Eguchi Yosuke) suffers from a rare condition called synethesia, a sensory problem, where one form of stimulus triggers a completely separate response. He feels that this problem isolates him from the rest of society and so he keeps it secret as best he can, even from his best friend and his fiancee.

Mari (Ishida Yuriko) suffers from a similar problem, and also keeps it secret. Her parents passed away years ago, and when her adoptive parents die mysteriously Mira begins to take more interest in the world around her, uncovering serial murders, mysterious codes and a bizarre stranger - Picasso - the merchant of Death. Shinsuke crosses path with both of these characters and fears that Mari is to become Picasso's latest victim!