Smolyan cop Filip Chanov gets unwanted help when a body is found in a local lake.

The prosecutor is keen to pin the murder on the refugee despite Filip's doubts.

Filip brings Mia back on the case. A boy is reported missing.

Diane agrees to go into the Devil's Throat cave. Mia and Asen find another body.

Mia believes that the rituals will not stop until the killer's project is completed.

Mia's accusation causes the team to turn their backs on her.

A dramatic night finds Lazar in custody, Diane in tears and Donka in labour.

Dimitar is kidnapped by someone claiming to be the killer but Mia is not convinced.

Filip questions his father's relationship to Deniz. Mia wants the truth about a legend.

In shock, Filip decides to withdraw from the case. Razovski wants Mia to stop digging.

Pieces of the puzzle begin to fit together with devastating effects for Filip.