Colonel Gambera leads a select team of the ROS (Special Operations Group) to capture mob boss Matteo Messina Denaro. With only three months to complete "Operation Sunset," the group faces a race against time. But amidst setbacks and unexpected escapes, Gambera realizes that a mole is hiding among his men.

After the discovery of the mole, the team is demotivated, but the operation continues. The mission on Mount Catalfano, to install an antenna, ends in tragedy due to a violent storm. Gambera and his team then decide to infiltrate the boss's sister's house: within those walls, an unexpected clue changes the course of the investigation.