When Monterey Jack falls victim to one of Professor Norton Nimnul's cruel traps deep within his castle, the Rescue Rangers face their most urgent mission yet. The chipmunks must navigate the treacherous halls of the mad scientist's stronghold, evading his automated sentries while scavenging components scattered throughout the fortress. With each piece they recover, their ingenious teammate Gadget draws closer to completing a flying contraption—their only hope of reaching their captured companion before it's too late.