世界上最强的杀手邓肯·维兹拉（绰号“黑凯撒”）即将退休，但前雇主认为他会成为公司的累赘。迫不得已的他只能重操旧业，对抗一伙年轻、敏捷、残忍的杀手，为了干掉邓肯，他们将不择手段。

Follows spymaster Professor Wolfgang McGee, an academic who secretly manages a roster of espionage assets. These assets, referred to as Romeo or Juliet spies, are informants engaged in intimate long or short term relations with state intelligence targets. Wolfgang is a semi-retired Romeo operator, having worked his way up from youth in an unnamed and officially deniable "service" under the umbrella of Canada's Intelligence Community.

When The Thief’s partner is kidnapped after stealing millions in cash from a merciless drug lord named Nushi, he reluctantly teams up with an angst-ridden orphan to rescue him. Nushi enlists her most trusted hitman, The Cowboy, a lovable charmer who’s quick with his guns, to track down the Thief. Guns, cars, and explosions will give the newfound partners a head start, but how long will they be able to keep it up?