A top-tier private bodyguard, Michael Bryce, lives a life of meticulously planned escorts and high-profile clients. However, his professional reputation plummets after a Japanese client is assassinated under his protection. Two years later, Bryce ekes out a living protecting low-end, coked out corporate executives. Meanwhile, Vladislav Dukhovich, a ruthless Eastern European dictator on trial for war crimes, systematically eliminates any witnesses who could testify against him. The key witness, notorious hitman Darius Kincaid, agrees to testify in exchange for the release of his incarcerated wife. As Kincaid is en route to the international court at The Hague, his convoy is ambushed. Despite the chaos, Kincaid survives, only to find himself in need of protection to reach the trial on time.

Bryce is reluctantly coaxed into guarding Kincaid by Interpol agent Amelia Roussel, who happens to be Bryce's ex-girlfriend. Her operation compromised from within, Roussel believes Bryce is the only one outside the loop who can safely deliver Kincaid. The odd pair, consisting of the meticulous bodyguard and the carefree assassin, must put their longstanding animosity aside in order to evade Dukhovich's henchmen. Their journey is fraught with peril, as they dodge bullets and escape deadly traps set by those determined to silence Kincaid before he can testify. As they bicker and banter their way across Europe, they encounter high-speed car chases, boat escapades, and a relentless pursuit, all while developing an unexpected bond.