Right after Shrek and Princess Fiona's honeymoon, the newly wed couple goes to Princess Fiona's parents for dinner. When a Fairy Godmother discovers Fiona and Shrek are married she reminds the king about a deal they areed on years ago, that Fiona should have married her son, who happens to be Prince Charming. The King then hires a cat named Puss-in-Boots, a sword fighting cat and ogre slayer, to kill Shrek.

When Shrek married Fiona the last thing he had in mind was becoming the next King of Far Far Away. But when Shrek's father-in-law, King Harold, suddenly croaks, that is exactly what he faces. Recruiting Donkey and Puss in Boots for a new quest, Shrek sets out to bring back the rightful heir to the throne. Meanwhile back in the kingdom, Fiona's jilted Prince Charming storms the city with an army of fairy tale villains to seize the throne. Fiona and...