The musical tells the story of a tribe of cats called the Jellicles and the night they make what is known as "the Jellicle choice" and decide which cat will ascend to the Heaviside Layer and come back to a new life.
Mjuzikl predstavlja priču o plemenu mačaka zvanih Jellicles i noći u kojoj izvode "Jellicle izbor" kada odlučuju o mački koja će se uzdići do Heavisidovog sloja i vratiti u novi život.