A tribe of cats called the Jellicles must decide yearly which one will ascend to the Heaviside Layer and come back to a new Jellicle life.

As members of the feuding Capulet and Montague families, Romeo and Juliet should be sworn enemies, but they fall deeply in love and marry in secret. That very day, disastrous circumstances lead Romeo to fight and kill Juliet’s cousin Tybalt, setting off a chain of events that culminate in tragedy.