Charlie O'Reilly has a secret: he remembers a younger brother named Liam, but no one else does. His parents, his friends, even his baby pictures show only an only child. When Charlie receives a mysterious note hinting at the truth, he teams up with his friend Ana to uncover a hidden world where forgotten people are trapped. Their journey reveals that Liam was 'forgotten' as punishment for a family secret, and Charlie must face painful truths to bring his brother home. This mystery explores memory, guilt, and the unbreakable bonds of family.