Don’t Go to Sleep

A family of four—Phillip, Laura, Kevin, and Mary—moves into a new house, hoping for a fresh start. They are accompanied by Laura's mother, Grandma Bernice, whom she alone seems to care for. They carry the sorrow of their late daughter Jennifer as they try to begin again.

Shortly after moving in, Mary begins hearing what sounds like dead Jennifer calling from beneath the bed. When she investigates, she finds a ghostly trace of her sister. The encounter foreshadows Jennifer's return and the danger looming over the family.

Jennifer appears to Mary in secret, revealing a murderous intent to kill the family except Mary. The ghost's presence unsettles the household and sows fear and secrecy. Mary becomes the only person who seems to retain some connection to Jennifer.

Kevin's pet iguana ends up in Grandma Bernice's bed, startling the elderly woman. The sudden shock triggers Bernice's fatal heart attack. This tragedy marks the first in a chain of escalating misfortunes around the family.

Kevin tries to retrieve a Frisbee from the roof and suffers a deadly fall. The accident seems linked to the mounting supernatural tension surrounding Jennifer. The family begins to realize something is targeting them.

The radio Phillip listens to in the bathtub shorts out and electrocutes him, killing him in the moment. Laura and Mary bear witness as fear and confusion take over the house. The patriarch's death destabilizes the already-fragile family.

Laura barely escapes the house's deadly events, injuring her arm in the process. With Phillip gone and Kevin and Mary altered by tragedy, the remaining members struggle to understand what's happening. Jennifer's presence grows stronger as the house tightens around them.

Believing she may have killed the family or be responsible for the horrors, Mary is placed in a mental institution. While there, she experiences a flashback that traces Jennifer's fate and the car crash that sealed the tragedy.

In a remembered episode, Mary and Kevin persuade Jennifer to join in a prank by tying her shoelaces together. A van collides with their car, Jennifer dies in the ensuing fire, and Mary and Kevin escape. Phillip is unable to rescue Jennifer before the car bursts into flames.

Back in the present, Mary asserts that she is actually Jennifer, claiming the deceased sister has possessed her living self. This twist reframes the haunting as Jennifer's return rather than a simple act by Mary.

In the final moments, Jennifer's ghost appears at the foot of Laura's bed and says 'Hi, Mommy.' The scene ends with Laura's terrified screams, implying the haunting will persist beyond the events shown.