The old king died. Shrek is in a panic. They want to make him the new ruler! Artie, Fiona's cousin, is the one who can relieve the green giant of the obligation to wear a crown and make solemn speeches. If only he would agree to become king! Shrek, along with Donkey and Puss in Boots, goes on a journey. And at this time... Prince Charming and a gang of thugs attack the Far Far Away Kingdom. Princess Fiona and her friends are forced to defend the castle. But there is a traitor in their ranks: one of the princesses has gone over to the side of the enemy! If Shrek does not return in time, the kingdom will forever remain in the hands of Charming. And Fiona will be imprisoned in the tower again...