An accident never comes alone.
A traffic accident in Paris reveals things no one thought possible.
Alien things.

Detectives Peyrac and M'Pelé investigate the case, but soon realize that this is not an ordinary, everyday case. They are opposed by organizations they have never had to deal with during their career. Secret services are eager to cover up the whole case.
The annoying thing for the detectives is that in order to solve the case, they also have to work with those organizations.

To everyone's frustration, it soon turns out that what seemed so simple at first glance, degenerates into an explosive situation that no one can keep a secret anymore.
A hidden world is exposed by brute force...