Hanna is desperately looking for the leak in the police department, but how far is she prepared to go in the search for the truth?

As Christian struggles with his past, Hanna contemplates throwing him in at the deep end once again -- as an undercover agent in a dangerous bid to infiltrate The Circle.

The Circle’s initiation tests put Christian’s life on the line as he must succeed while hiding his identity. Meanwhile, Hanna keeps Blanka in hiding, away from Christian.

Despite knowing the identity of the leak, Christian relentlessly pursues his target. Consumed in his disguise, he is in too deep to get out -- and Hanna is the only one who can save him.

A murder throws the investigation into chaos as The Circle reveals its true power and the strain on Christian may prove to be too much; if he is exposed, all is lost.

With Christian spiraling out control, Hanna and Bjorn are facing danger from two sides. Secrets kept hidden are exposed as the lines between friend and enemy become blurred.

With Bjorn missing and Christian slipping out of her hands, Hanna doesn’t know what to do. Meanwhile, Lena tries to find a way out of the vice’s grip.

With Hanna framed and forced to flee, Bjorn and Blanka captured, and Lena hopelessly in love, a fight for survival begins and a fateful choice must be made by Christian.