Undercover (2011)

An unassuming boy from the suburbs of Sofia transforms into Bulgaria's first undercover cop. Shaped by his father's demands to deceive from an early age, Martin perfects his skills in lying and manipulation. Driven by a deep-seated disdain for criminality, he takes on a perilous mission to infiltrate the operations of a wealthy crime lord. Complicating matters, he becomes romantically entangled with Suni, the mob boss's girlfriend. As he gains the criminals' trust, he uncovers a shocking betrayal within the police force, leaving Martin isolated and forced to navigate treacherous choices.