“Combustion” revolves around Navas and Ari, a burglar couple. Ari tempts and deceives the wealthiest men in luxury houses, while Navas arranges a robbery and Ari is used to threaten and rob the "prey". Finally they meet Mikel, an employee of a jewelry store. While planning for the new target, they realize the secret about Mikels past, there is something that will benefit Navas and Ari. And from here, they begin a new journey with unexpected situations, speed, emotions, crime and... money.