Ari is just a regular avatar from Blockville who loves hanging out with his two best friends—Zeke, an obby and parkour pro, and Jez, the ultimate hacker and Queen of Tech. When Ari, Jez and Zeke visit the army base with Zeke's dad, they find themselves in Professor Gilford's laboratory once again. But when a certain sneaky rat causes one of the inventions to activate, the gang find themselves in an unexpected location—the rat's own cage! Shrunk, scared and trapped, Ari and his friends must find a way out to survive a rat attack!