Wearing an old trenchcoat and his indispensable felt hat, the 20-year-old Jérôme tries to look the part of a seasoned sleuth. By day he translates detective novels and fantasizes about being one. By night he's enrolled in Professor Maison's correspondence course for would-be private eyes. His girlfriend, Babette, is a flight attendant who brings him recordings for his collection of police sirens from around the world. And then, his first "case": In the past two months, fifteen people in Paris have been killed by poisoned darts. All that witnesses saw was a feathered shadow and a blowgun. The job of capturing the flamoyant assassin is entrusted to Jérôme by Professor Maison. Things get off to a rocky start, however, when the professor appears to be victim number sixteen!
— Description from Comic Vine community (comicvine.gamespot.com).
