The King of Far Far Away has died and Shrek and Fiona are to become King & Queen. However, Shrek wants to return to his cozy swamp and live in peace and quiet, so when he finds out there is another heir to the throne, they set off to bring him back to rule the kingdom.
Shrek the Third - watch online: streaming, buy or rent
Currently you are able to watch "Shrek the Third" streaming on Netflix. It is also possible to buy "Shrek the Third" on Google Play Movies as download or rent it on Google Play Movies online.