
Sonny Cooke, a high school student, awakes from a car accident to discover his mom, Ellen, looks slightly different. But no one believes him because no one else sees the change in her.

After hiding from his "imposter" mom all weekend, Sonny returns to school determined to find help. Sonny pursues a police officer at Career Day, who tells Sonny someone broke into his house while he was in the hospital.

Sonny is forced to stay home with Ellen, so he sets a trap to catch her in her lies. At school, rumors spread that Shovel saw a dead body, and Mallory and Chloe grow closer. Meanwhile, Sharla tails Ellen to a meeting with a menacing stranger behind a bar.

Sonny attends a party at Bucket's Pond hoping Shovel might have details about his "real" mom's fate. But when Ellen shows up at the party, Sonny's belief that she's an imposter reaches a breaking point. Meanwhile, Vogel forges a new connection.

Sonny skips school with Mallory. Ellen investigates Sonny's suspicious behavior.

Sonny's discovery about his mom's past leads to a potentially dangerous search for answers.

Sonny seeks out therapy and tries to return to normal while Mallory embraces her faith.