When the body of a woman is found in Bulkya Docks, an area that sits on the border between Beszel and Ul Qoma, Inspector Tyador Borlú notices similarities with an old case that has always haunted him.

Borlú has breached, now he is under Breach control and they want to know all that he knows about the third city - Orciny and to find the true link between Mahalia, Bowden and Katrynia.