In a quiet, snow-blanketed Canadian town, four-year-old Caillou lives a seemingly idyllic life with his loving parents and baby sister Rosie. But Caillou is different—withdrawn, distant, and increasingly isolated. His only companion is Gilbert—once a friendly family cat, now a sinister imaginary friend that speaks only to him. When children begin to disappear and unsettling drawings appear in Caillou's room, whispers of something darker take root. As the line between reality and imagination dissolves, psychologist Dr. Elaine Harwood and haunted detective Lucas Brent uncover the truth: Caillou’s "friend" may not be imaginary at all. With each day leading to his fifth birthday, the sinister entity feeding on Caillou's innocence grows stronger. When his sister vanishes and blood stains the snow, Caillou’s family must confront a horrifying legacy tied to an ancient cursed book—one that transforms make-believe into a deadly force.
