Seoul University junior Yoo Hana expected nothing to come from her drunken one night stand with Exo frat boy Park Chanyeol.  However, when she unknowingly takes the frat's "lucky shirt" as a coverup for her journey home, mystery and chaos ensue throughout the entire campus.  With a whole frat trying to find her, Hana and her housemates must sneak the shirt back to Exo without anyone noticing because if they do, some deathly form of social torture will be awaiting them.