The TV series "Magistral" is a detective action film about a criminal war on the railway. The special forces of the transport security, led by Commander Oleg Gromov, are tasked with protecting a major railway hub from crimes and terrorist attacks. Under the watchful eye of the fighters, there is a thousand-kilometer stretch of track where passenger and freight trains pass daily. Any oversight could lead to an irreparable catastrophe. In parallel, Gromov investigates the mysterious death of his mentor, Sanych.