Eleven-year-old outsider, Stephan, arrives at Castle Schreckenstein, an all-boys boarding school, where he soon finds himself in a 'pranks-competition' the boys are currently fighting against the neighboring girls of Castle Rosenfels. When the girls have no choice but to move to Schreckenstein after a failed prank, life at school is suddenly nothing like it used to be...

Stephan (11) finds being shoved off to the boys boarding school at Castle Schreckenstein less of a bore when he's initiated into a cool 'secret society', and fielded in their never-ending prank war with the neighboring Castle Rosenfels girls boarding school. Although encouraged by some school staff, their daring pranks also backfire, bringing 'victim' girls into their dorm, which changes everything.—KGF Vissers