Leading female industrialist, Rio, has been named a key person of interest in a serial murder case investigated by Detective Daiki. The two were once in love with each other in their youth. Rio’s legal advisor, Kenichiro, will do anything for her. Caught in a love triangle and a criminal investigation, Rio and Daiki’s “forbidden” romance seems doomed by a missing person incident 15 years ago and its possible links to a current serial murder case. Is Rio complicit? What would you do to protect those who are most beloved to you, be it a first crush, a sibling, a parent, a child, or a lifelong friend? This suspenseful romance evokes the uncompromising passion, struggle and redemption of true love.