38°5 quai des Orfèvres.

A serial killer, nicknamed Le Ver(s) Solitaire (The Lone Worm) for the alexandrines left at the crime scenes, is spreading terror. Under the orders of a commissioner, Clarisse Sterling, a rookie in the crime squad, can only rely on her instinct, 200g of chouquettes and the virtues of a well-placed pineapple to solve this investigation and save her skin.