Zip & Zap and the Marble Gang

The twins Zip and Zap are sent to Esperanza, a school where games are forbidden, and they start breaking the rule before they have unpacked. They fall in with the Marble Gang, a band of kids resisting the staff, including Falconetti (Javier Gutiérrez). Oskar Santos follows them toward a secret buried deep in the school, and if they get caught, they lose the only friends they have there.