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At home, Adèle created a new invention: a mortellar detector. Finally, a way to recognize his fellows, strange and mortal people at the same time! Adèle decides to test his invention at school: Geoffroy, Jade, Miranda, Jennyfer... all his comrades pass there but none move the detector needle. Will Adèle find someone as deadly as she does?© Mr Tan and Diane Le Feyer based on the work created by Mr Tan and Miss Prickly