In the quiet suburbs of Mississauga, Ontario, two teenage sisters orchestrate a chilling and calculated crime against their own mother. What initially appears to be a tragic, accidental drowning in a bathtub is soon revealed to be a cold-blooded murder, meticulously planned and executed by the daughters. As investigators peel back the layers of this disturbing case, they uncover a web of deception, manipulation, and a dark family history that led to the ultimate betrayal.