An epic apocalyptic battle puts everyone to the test and old enemies must become allies. Outnumbered by the US Army, the zombies show a surprising intelligence. Marroquín must attempt another amazing escape.
Murdoch takes extreme measures to contain the crisis, but Snowman has other plans. Dávila and Lilia face an unexpected ambush. Lucas’s attempts to save an old friend put him in grave danger, and Marroquín realizes that his enemies have found him.
When Snowman’s experiments on an infected human fail, Murdoch agrees to get more human subjects. Agent Taft discovers a clue about Marroquín. Lilia escapes from an enemy thanks to Dávila’s help.
The zombie army recruits new members. Marroquín discovers that one of his men is a traitor, and a new danger hunts Lucas, who realizes that something strange is happening. Becerril gets closer to his human enemies.
When Marroquín reunites with his son Lucas, he realizes that being a father is more difficult than running a criminal empire. Becerril and his elite unit realize they have underestimated their opponent. The effects of the US Army secret experiment keep spreading.
Drug lord Alonso Marroquín escapes from a Mexican prison in an attempt to go into hiding. A US military secret experiment goes wrong and the elite unit from the Mexican Police that is after Marroquín gets infected, creating a new zombie species. The Army and the zombies end up at the drug lord’s hideout and a battle for human survival begins.