Johan Falk: Vapenbröder

John Falk is on a routine mission with the Gothenburg police special unit GSI. With the help of a Norwegian undercover police officer and a civilian infiltrator embedded in one of Gothenburg's most powerful criminal gangs, the GSI is attempting to purchase six assault rifles in order to remove them from circulation. However, the situation takes an unexpected turn when a new, unknown buyer suddenly appears, seeking not only those weapons but also additional arms, including armor-piercing ammunition. The GSI quickly realizes that this is not the work of ordinary robbers, but rather a sign that someone is preparing to ignite a war on the streets of Gothenburg. At the same time, the situation becomes increasingly dangerous for John Falk's infiltrator, Frank Wagner, as the leader of the gang he is embedded in begins to suspect that one of his own members is leaking information to the police.