Twelve-year-old Alexis "Alex" Evins is a loner, a tomboy and a first-class prankster, following in the not-so-glorious footsteps of her older twin brothers, Parker and Nick. When the Evins siblings play a prank that goes just a tad too far (resulting in setting a neighbor's sofa--and hair--on fire), their dad decides it's time for some tough love. He signs them up for an after-school program called Champs!, which guarantees that it will turn any kid...