With dreams of being an inventor, opportunist and eccentric elf Bernard D. Elf is made to feel a fool yet again when his innovative creation to bring back people's favourite Christmas memories back to life fails miserably. However he is then presented with the perfect opportunity to prove his worth, when Santa is kidnapped by the evil Neville Baddington, and his demanding mother Vera, who have their heart set on discovering Santa's big secret: how he delivers presents across the world in just one night. However Bernard knows how he does it, using a time travelling device to ensure all children wake up on Christmas morning with their presents under the tree. The elf decides to use this to his advantage, as he plans on going back in time and preventing the abduction from ever happening, and save Santa - and Christmas - for the entire world.

After a battle in a power plant, Ben notices something strange is happening with the omnitrix, but doesn't tell anyone. Tetrax arrives, and tells them the omnitrix is broadcasting a self destruct signal. Tetrax and Ben go to find the creator of the omnitrix to fix the omnitrix before it destroys itself and the universe along with it. Gwen stows away to help her cousin.