The tension hits a breaking point in Fifties Professionals. A high-stakes four-way confrontation erupts as Prosecutor Kang exposes a dark secret: Bong Je Soon may be the legendary operative, Bulgae.

Loyalties fracture instantly. As Jung Ho Myung and Kang Beom Ryong realize their comrade could be a mole, the camaraderie turns into lethal suspicion.

Is their brotherhood built on a lie?

Is their brotherhood built on a lie?