After Li Cai, a boy on the autism spectrum, takes his own life with his grandfather's gun, the same gun is given to his younger sister Sophie as a birthday gift. The calm surface of a family shatters through the prism of tragicomedy — a missing cat, the parents' unnatural composure, a gap in the sister's memory... We ask how trauma is buried, and who, in the unnoticed routine of daily life, heard that gunshot.