This Side Quest take place at the Gotham University at around level 26. Given to you by the Zombie Boy standing next to Etrigan the Demon. The objective of the mission is to rob (destroy) the Hotdog stand as a zombie. Getting turned into a zombie by Etrigan is part of your main quest. After you finish this side quest, the side quest Saving the Souls of the Students will automatically be unlocked/given to you.