When a house cleaner wakes up next to her client's pool covered in blood, she discovers the owner dead in the water and her eight-year-old son missing. With no memory of what happened, she races to uncover the truth.

After losing her mother in an accident, a teenager and her father welcome a distant cousin into their home. Hoping to claim the family as her own, the psychopath hatches a devious plan to recreate the prom she never experienced.