Pinocchio's Revenge is a story about a highway patrolman who discovers a man digging a grave for his own son on a rainy day. The man is arrested and multiple pits with corpses and a dummy are found at the scene.
The media quickly labels the man, Vincent Gottois, as a serial killer. Despite the efforts of his defense attorney, Jennifer Garrick, Vincent is sentenced to the electric chair.
Jennifer is a divorced mother to Zoe Garrick, who is bullied at school by her classmate Beth. With the help of their maid Sophia, Jennifer tries to navigate raising her daughter and managing the household.
Zoe has therapy sessions with Dr. Edwards following her parents' divorce and her mother's new relationship with David Kaminsky, a construction worker.
During Zoe's birthday party, a doll gift fails to arrive, prompting Jennifer to give her the Pinocchio's dummy as a substitute. Zoe becomes attached to the dummy, blaming it for any misfortune that occurs.
As strange occurrences begin happening in Jennifer's home, she starts to believe that Pinocchio is somehow responsible for the chaos.