Huguette (87) is a woman living alone in her stately home. One morning, a man named Luca (32) knocks at her door. She decides to invite him in for tea before he has the chance to introduce himself. What follows is a peculiar guessing game that Huguette playfully engages in with her guest. A strange relationship begins to form between the two. However, when Huguette finally discovers the reason for his visit, their budding friendship abruptly ends and spirals into a nightmare.