Set up high on the cliffs, in the grounds of a ruined monastery, overlooking the dreary town of Blinkton-on-Sea, is the otherwise unremarkable Blinkton High School. Here resides the enigmatic Inky Stevens - a talented and astute student, better known as "the Great School Detective." What appears to be a trivial search for a missing set of keys soon turns much more sinister with our hero facing mortal danger. Will Inky unlock this case and find the key to his survival or will he meet a horrific end?