Mikey

Mikey, a young boy, is setting newspapers on fire in his basement. He blames his younger sister, Beth, when his foster mother, Grace, reprimands him for it. Grace slaps him, and he later yells at Beth, asking her why she didn't defend him. He ends up throwing her doll into the pool. When Beth reaches to get it, Mikey jumps up and down on the diving board, causing her to fall into the pool and drown.