Foul Play

"Fould Play" is a sidequest of Episode 2: HOODwinked. You can access the area to start this sidequest only after having talked with Matt in the Computer lab.

How to start the sidequest
After exiting the Cafeteria talk with Henry to start the quest. 

Walkthrough
"Henry, the school's de facto nerd, has asked you to help him find his baseball card collection that was stolen from him. Billy's crony Blake was seen picking on him in the morning before class, so he's probably the first person you should look for."

Objective: Search for Blake.
Pass through the door to the left, go past the rubble and then all the way up north. Hugging the wall keep moving left until you run into Blake. Talk with him, win the fight and then talk to him again. 

Objective: Return cards to Henry.
Go back to where Henry was and talk to him. You will get a Baseball Card and 100 XP as a reward for completing the sidequest.