Mouseford Academy is about to get rocked with the arrival of the pop-sensation 6 Seconds of Spring! Now the stage is set for a talent contest where the students must perform in front of their celebrity judges. Thea Sisters Nicky, Paulina, Violet, Pamela, and Colette prepare their own song, but when they hear their shy friend Dina display her hidden talent for signing and song writing they know the overall concert will be a success. But as Dina takes the stage for her debut the lights turn off and a fire works display explodes outside. When the lights return to the auditorium, Dina's piano is gone! The show must go on and it is up to the Thea Sisters to crack the case!