Arthur Bishop is a 'mechanic' - an elite assassin with a strict code and unique talent for cleanly eliminating targets. It's a job that requires professional perfection and total detachment, and Bishop is the best in the business. But when his mentor and close friend Harry is murdered, Bishop is anything but detached. His next assignment is self-imposed - he wants those responsible dead. His mission grows complicated when Harry's son Steve approaches him with the same vengeful goal and a determination to learn Bishop's trade.
When high-powered book editor Margaret faces deportation to her native Canada, the quick-thinking exec declares that she's actually engaged to her unsuspecting put-upon assistant Andrew who she's tormented for years. He agrees to participate in the charade, but with a few conditions of his own. The unlikely couple heads to Alaska to meet his quirky family and the always-in-control city girl finds herself in one comedic fish-out-of-water situation after another.