Young student Joel is fascinated by the magic of Rithmatics but few have the gift and he is not one of them. Undaunted Joel persuades Professor Fitch to teach him about this geometric magic. For although Joel cant infuse his protective lines and circles with power or bring his chalk-drawn creatures to life he can really understand how it works. However a daunting test lies ahead when someone starts kidnapping top Rithmatic students at his school Armedius Academy.Since hes not a magic user Joel appears to be safe and hes desperate to investigate and prove himself. Then people start dying - but can Joel really stop a killer alone? Hell need the help of Rithmatist apprentice Melody as even more students disappear. Together they must race to find clues before the killer notices them - and takes them out too.