Duet is an animated short film that explores the persistence of love, the transcendence of music, and the heartache of losing a loved one. The story centers on a cat who is adopted by an elderly woman. The two connect as the woman teaches the cat to play piano. After the woman passes away, her daughter and grandson bring the cat home, where the cat has difficulty adjusting to the new environment and family. As the cat and grandson play a duet on the keyboard, the process of healing begins.