A woman tries to protect her family after her husband has an affair with their nanny. As her husband's co-workers are killed, she discovers everything is not what it appears to be.

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.

A nearby meteorite crash blocks off the dinosaurs' water supply, starting an ecological chain-reaction that threatens life in the valley. All the dinosaurs, including a group of stupid bullies, must cooperate in an effort to free the blockage, which involves a risky venture outside the valley.