After the death of King Harold, Shrek is next in line for the throne of Far Far Away. However, he doesn't want the responsibility and sets out to find the rightful heir, Arthur. Alongside Donkey and Puss in Boots, they embark on a journey to bring Arthur back to rule. Meanwhile, Prince Charming gathers an army of fairytale villains to take over the kingdom. Shrek must rally his friends and prove that he is capable of being king, while also learning the importance of family and friendship.