Poor Percival Butterfingers is the butt of all the pranks played by Billy Stout and his chums. The arrival at college of Ralph, a freshman, diverts attention from Percy. Just before Ralph appears, Billy receives a letter from the boy’s brother, requesting that some of Ralph’s conceit be taken out of him. As luck would have it, Ralph and Professor Nutt overhear Billy and his chums concoct a black hand scheme. At the same time, a real gang of black handers plan to blow up Ralph’s room to square a fancied wrong against his wealthy father. One of the black handers enters Ralph’s room with a bomb, whereupon the boy, believing him to be a student in disguise, beats him up and chases him away. The bomb dropped by the black hander sputters on the floor. Carelessly picking it up, Ralph throws it out of the window just as Billy and his crew arrive. The bomb explodes, knocking the boys over and wrecking the building. Police and faculty members are attracted to the scene. In their effort to escape, the conspirators run into the real black hand artists and a battle royal takes place. When the police arrive, they arrest Billy.