In Monsters Inc., a work station where monsters scare children to power their city, a glitch in the system occurs when parallel dimensions to coincide with the Monsters Universe. Enter Shrek, the ogre of Fairy Tale land, who walks in and becomes top scarer of MI. Sulley is impressed but Mike is very skeptical. They try to figure out if he is someone to be reckoned with, since ogres are among much scarier monsters who eat children. Sulley and Shrek form a rivalry and fight it off in an epic duel!