The retired King of Killers, codenamed "Zero", faked his death in an explosion to live a peaceful life as a food delivery driver. During a routine delivery, he subdued an attacker threatening A-list superstar Scarlett in under three seconds, just to keep his five-star rating. He left immediately, but Scarlett posted a $15 million internet-wide bounty to find and marry him. This blew his cover, drawing Interpol and former enemies to his trail. His ex-right-hand man, Seven, caused more trouble trying to protect him. Forced to become Scarlett’s bodyguard, Ethan foiled a deadly gala attack. When his comrade Ghost betrayed him to seize power, Ethan returned to crush the rebellion, with Scarlett filming a documentary along the way. Ultimately, he gave up his crown and power, finding new meaning in ordinary, chaotic, yet warm moments with Scarlett.