A kid applies his grandma's tears to his eyes and suddenly sees the invisible dead wandering through her house. That single image, the casual intimacy of folk magic, the immediate consequence, tells you everything about how this film lives in the gap between childhood wonder and genuine dread. Grandma isn't explaining the ghost month or performing ceremonies for exposition; she's actually doing the work, and DouDou walks into her life mid-ritual, which means you're never safe on solid ground. The devil's trick works because it sounds like a gift, and by the time DouDou realizes what he's actually seeing, he's already responsible for letting something out that was supposed to stay locked away. This is what happens when you respect the rules of a culture instead of using them as decoration.
DouDou arrives at Grandma's house during the seventh lunar month, when the boundary between the living and dead grows thin. His grandmother is no ordinary woman: she performs rituals to guide wandering spirits and communes with the supernatural as naturally as brewing tea. Everything changes when DouDou cracks open a sealed urn and releases something far darker than a restless ghost. A possessed cat offers him a strange gift: the ability to see invisible spirits using his grandmother's tears. Suddenly, the world around him fills with gentle, curious ghosts who've been invisible all along. But the cat's kindness hides a hunger. DouDou must figure out the truth before the devil uses him to consume every spirit his grandmother has spent her life protecting. What begins as a summer visit becomes a race against time, where a boy discovers that his grandmother's ancient knowledge might be the only thing standing between two worlds.