Watch Ratgirl for Free: How to Stream the Movie Online at 123Movies. . Ratgirl, a diffident 19 year-old woman, as she and her older roommate Alice discover their apartment is infested with rats — a claim which is adamantly ignored by their miserly landlord. Over the course of a hellish fourty-eight hours, Ratgirl unconfidently navigates sexual harassment, housing instability, ex-friendships, and suppressed mental illness.