Megan uses the weeks leading up to every Christmas to help around with any Christmas-related tasks. When the opportunity arrives to save a Christmas party and dazzle her crush, she must choose between the man of her dreams and Mr. Right.

When her husband is hospitalized after a car accident, EMT Karen decides to rent out their spare rooms online. All goes well until Miranda moves in. Miranda quickly infiltrates all areas of Karen's life. When one of Karen's renters is found murdered, Karen becomes convinced Miranda was involved but has no idea that kicking her psychotic guest out will send Miranda into a murderous rage.