It all starts off with a bang, as the President's daughter needs to be rescued at the "Troublemaker" theme park, where the park's owner (played by Bill Paxton) has just opened up a new thrill ride. Agents "SK1" and "SK2", Carmen and Juni Cortez (Alexa Vega and Daryl Sabara) are called in to save the day. They are now members of the newly formed SpyKIDS division of the OSS, after the success of their first mision. This time, however, they have some competition in the form of Gary and Gerti Giggles (played by Matthew O'Leary and Emily Osment) as Agents "SK3" and "SK4", who are also called in to aid in the rescue. Gary and Gerti are more interested in the publicity, while Carmen and Juni are more focused on getting the job done, and hence the rivalry is introduced. During an OSS awards dinner, someone steals a device that shuts down anything electrical, and Juni is blamed and so he's dismissed from the agency. Carmen hacks into the agency computer and reinstates her brother, and the two then embark on the assignment which takes them to a mysterious island inhabited by a mad scientist (Steve Buscemi) and the strange monsters he has created. While their parents (Antonio Banderas and Carla Gugino) worry about them, we get to meet their Grandpa and Grandma (Ricardo Montalban and Holland Taylor), who are also spies, now retired. But the adults here are portrayed as the less intelligent group, and children will enjoy the fact that these kids appear to be smarter than their elders. The special effects sometimes seem cheap and silly, but kids will most likely enjoy seeing all the gadgets, but adults might not have as much fun as they did watching the earlier film.