During summer camp, a scout of the 46th Sainte-Eulalie drops acid and discovers diamonds on a siren.
Then, clear-headed, he realises that the siren is a corpse.
Then, he finds out that the corpse is the ex of the girl he’s in love with.
Then, that this girl and her ex have stolen the diamonds from a dangerous fence.
Then, that this fence is looking for them.
Then, that the fence is himself threatened by a murdering Sikh.
What was a dream is now a nightmare.