Where Is Moonnie?

Original title: 유기된 친구들

Eunjo, Moonnie, and Geun-young are old friends. To live a more disciplined life, Moonnie hires a hitman to kill her if she fails to follow her schedule. The next day, Moonnie goes missing. Amateur detective Geun-young begins investigating to find her friend, and her suspicions turn towards Eunjo.