Secret agents Juni (Daryl Sabara) and Carmen Cortez (Alexa Vega) set out on their most mind-blowing mission yet: a journey inside the virtual reality world of a 3D video game where awe-inspiring graphics and creatures come dangerously to life! As they face escalating challenges through increasingly difficult levels of the game, the Spy Kids must rely on humor, high-tech gadgets, and the bonds of family in order to stop a power-hungry villain (Sylvester Stallone) set on controlling the youth of the world!