Под прикритие第4季 (2014)
剧情：
Six months after the recent events, Martin Hristov is officially a police officer in the GDBOP, in the department of Commissioner Emil Popov. Ivo rules the street, disguised behind a legal business. Next to him is Nia Tujarova, who has returned from New Zealand in an attempt to reconcile with her father Djaro. Djaro is in Turkey to make contact with the Turkish mafia and is involved in the restoration of an international drug channel through Bulgaria. Tragedy overtakes Kukata in his Spanish exile – he returns to Bulgaria with a plan for revenge. Martin took advantage of his desire for revenge. The two make a deal that affects the interests of Ivo, Jaro and the Turks in life and death.
