As the explosion harms an unintended victim, Richi and Amparo track down a key player from the Expo, while Robledo teams up with a forensic investigator.

Reeling from yet another tragedy, Amparo and Carmen join forces and look into Rosa's past. A shaken Richi stumbles upon a vital piece of information.

Palacios attempts to buy his safety, but as the killer's bloody vendetta reaches its crescendo, the race to stop him takes a high-speed turn.