Following a completely different narrative than that of the eponymous film which it is based on, Shrek is meant to be a "continuation" of the story of the film, taking place after the title character has set out to regain his swamp and become a "'de facto' hero" to the fairy tale creatures. Shrek is delivered a message by the infamous Magic Mirror that his wife Princess Fiona has been captured by an evil wizard, Merlin. Shrek must travel to Merlin's Dark Tower Fortress of Pure Evil, but an impassable fog has been laid across the Fairy Tale Lands. The fog and Merlin's Fortress can be passed through the completion of Good Deeds. The Magic Mirror gives Shrek a Book of Good Deeds and offers to teleport him to places where Good Deeds are required.
