A body is found in a deserted quarry. Another unit believes the body is a victim of a serial killer they're investigating, but Darius wants to claim the corpse. A volatile collaboration launches.

A young woman in a bridal dress is found dead under the Citadelle bridge. Someone must be looking for her. Her future husband must be frantic with worry. Why has no one come looking for her?

The skeleton of a teenager is found in the chimney during a demolition party at a teen summer camp. How did he get there? Nobody has ever been reported as missing in 50 years of the camp.

Two frozen feet are all the team have to identify what is probably a man, while they hope for more of the body to turn up. Is it the work of a perverse killer? The Invisibles must find out.

A recently deceased young woman lies at the bottom of a grave that's been abandoned for nearly a century. Darius's team is on the case: who is this new Invisible woman?

A man's corpse with a bruised face is found in the countryside. No info in the police databases can help identify him. Meanwhile, at a luxurious home, a woman calls the same number again and again...