Five teenagers with various troubles, are in detention and experience Saturday in the school library together. Meet at 7 am, they seemed so different and have nothing to say to each other. they are so different and have nothing to say to each other. But at 4 pm, they gradually become close friends after undergoing heart out together and realize that they really do not differ as much as they think. In real life, they remain "bookworm" (Brian), "athletes" (Andy), "the trash" (Allison), "princess" (Claire) and "criminals" (Bender) but in each other's eyes they always belong to "the The Breakfast Club" ...