In a great rock quarry, an explosion unveils an object from a different time.

Set in July 1793 during the outbreak of the French Revolution and the unleashing of the Reign of Terror, a young girl from Caen named Charlotte Corday plots to assassinate Jacobin newspaper editor Jean-Paul Marat.

A teenager feels an endless fascination for his cellular which will enable him to reach his aim: alluring the pretty high-school girl he's in love with. Unfortunately, this special "addiction" will not be without negative consequences on the behavior of the boy...