When her seven-year-old daughter Lizzy disappeared into a corn maze on Halloween night in 1984, Catherine Bryant didn't think she'd survive the loss.For nearly forty years, Catherine has struggled with her grief and guilt, so when her doctor delivers a fatal diagnosis, it's almost a relief.But something is happening to Catherine. Whether a result of her medications or from the disease that's destroying her brain, Catherine is experiencing vivid nightmares that spill over to waking hallucinations of a malicious cartoon scarecrow. Smilin' Sam has ripped himself free from the billboard above the maze claiming he wants to help her.As her dreams reveal new clues, Catherine becomes obsessed with finding Lizzy's remains so they can be laid to rest together.The lines between fantasy and reality blur as Sam becomes increasingly real and violent. Will his cruelty and power over Catherine lead her to do the unthinkable as her mental state deteriorates?