Accused of murdering his girlfriend's mother, Cain's son Ben must prove he is innocent, but all the evidence appears to be stacked up against him. Cain needs to find the real murderer, and quickly.

Cain's son Ben falls in love with Amandine and is welcomed into her family with open arms. But when Ben's future mother-in-law turns up dead, he finds himself accused of drug dealing and murder.

At first glance, the robbery of a jewelry store seems trivial. But Cain thinks the case goes beyond what it seems ...

When a violent gambling addict is found dead, Cain's investigation leads him to a former champion kick-boxer who runs self-defence classes for women but has some unorthodox teaching methods

A man who succumbs to his taste for sado-masochism, a criminology student who collects lovers, a jealous brother, a dangerous boyfriend - all are hiding guilty secrets, but Cain must expose the truth

The body of a suspected paedophile is found. Cain is determined not only to locate the killer but also to discover whether the victim was really a child abuser or just a casualty of the rumour mill.

When a company finds itself in trouble, its employees are willing to do what they can to help revive the failing business and safeguard their jobs. But how far will they go? Cain needs to find out.

Allard, a former police officer who is battling cancer, realises that several recent killings bear a striking similarity to one of his past cases. Together, he and Cain vow to locate the culprit.