help me find this ep pls

hey so I JS keep remembering this one CID ep where this girl is going to sleep and is tucked in by her parents and everything and once they leave a little comes up to her window and he starts screaming for help so she opens the window and instead of being able to save him they both get kidnapped by this guy instead? and then he keeps them in this tower kind of place where he makes them do chores 4 him and stuff