Plunged

"Plunged" is a sidequest of Episode 2: HOODwinked.

How to obtain the quest
From the School entrance go up the stairs and then forward, keeping a bit on the right. You will find the entrance of a bathroom where you will find Ben. Talk with him to start the quest. 

Walkthrough
"Ben has clogged the toilet in the main hall and has no way to flush it. A teacher has threatened his life if that flushing doesn't occur. Help Ben get a plunger to save his life!"

Objective: Find a plunger.
In the hallway past the Cafeteria (you can only access this area after having talked with Matt in the Computer lab) go in the first room to the right, then past the rubble and all the way up north. Go right and enter the door to find the plunger on the floor in the bathroom. 

Objective: Return plunger to Ben.
Return to Ben in the same bathroom where you got the quest and talk to him. You will be awarded with 150 XP and 5 $.