The gang's efforts to help JJ master the ancient art of blamjitsu are ruined by Walter's plans to capture the Beanotown yeti. Dennis and the gang defend the yeti, and help JJ unleash her inner blam, in a gravity-defying blam-jitsu face-off with the WilburCorp henchbot.

The gang get lost in the woods and stumble into the Land of Lost Things, where Gnasher gets dognapped by a Gnashersaurus rex which has lost its beloved egg. To save Gnasher they have to rely on Pieface logic to reunite the G-rex with its egg before Walter makes a record-breaking giant omelette with it.