Sean Garrison is an agent with the CIA.
Our first meeting with him he certainly does not act like an agent, although flirting with the flight attendant could have seemed fitting for the stereotype. He is a traveling businessman who feels himself lucky to have a job that paid alright and which sends him around the world. He shares a house with his friend, Brian, whom he has known since childhood, and Bailey, a lovable Boxer who is also Sean's dog.
This has been going for a while. Prior to that he had worked for a restaurant marketing/advertising agency based out of Cleveland doing work that was alright but nothing great working for a man he did not like that much and getting just a tad more out of shape each month despite pick-up games of Lacrosse. Then a bit of flippant talk on a day his boss was even more annoying than usual and Garrison was out of a job.
A week of doing nothing and enjoying it ended when he gets an email for a job interview with Global Marketing Research offering him the chance for extensive travel throughout Europe and Asia. Things are looking up especially when he lands the job for double his previous pay.
Jump ahead one year and Garrison is 28 years old and enjoying life. He has turned into a bit of a germaphobe, hesitant to touch certain surfaces and mindful about sitting too near people while traveling. He is aware of his new obsession with exercise, pleased that he is in such good shape now but noting that he is often doing pushups until he collapses. He still rooms with Brian and still has Bailey. Life is alright.
Until people start trying to kill him and that crazy though drop-dead-gorgeous woman Stacy came along. Granted, she is trying to keep him alive which is a good thing but he has no memory of her and she is telling him she is in love with him and pregnant with his child.
Things get stranger after that. And fun.