Since her accident with the herd, Scooby has been visiting Nova regularly in the hospital. Meanwhile, a deceased ska band returns from the grave and hypnotizes partygoers at the local nightclub to dance to their music. The dancers are taken to hospital, whereupon the gang is called to solve the mystery before they dance themselves to death. Eventually, the band hypnotizes Fred and the girls, forcing Scooby and Shaggy to turn to the Hex Girls for help.