This suspense and love story revolves around three people: Rio Sanada, a businesswoman who was a witness to a murder case; a detective chasing after the truth of this case, who also was Rio’s first love; and a lawyer who will do anything to protect Rio. In 2006, in the peaceful countryside town in which Rio grew up, there was a missing person case. Fifteen years later, someone involved with a murder appears before Rio, and the case that was once sealed in memory is once again in motion.