Mordecai is a groundskeeper at The Park. He is known for being a cool laid-back guy who has a best friend named Rigby. He is the responsible one in his friendship with Rigby, but that doesn't make him an actual responsible person. He usually keeps his cool and enjoys himself having fun playing videogames, getting a coffee, playing a dumb game or getting in any kind or trouble with his best bud. His love life hasn't been that great and, right now, he is a single guy who's not very interested in love now.
Meanwhile with Benson, he is the park manager and Mordecai's boss. He is known for getting easily provoked and get angry, and it's usually Mordecai and Rigby's fault. He works to the point of exhaustion, he is stressed, has low self-esteem, enger issues, and the list goes on. It seems like the onely thing that keeps him happy is his girlfriend, Pam. But that seems to be going a bit down hill.
Mordecai and Rigby are know for slacking off and screwing up the simplest of jobs that Benson gives them. But for some reason, Mordecai seems to be taking his job more seriously. And if he does the work, he'll take or even drag Rigby along with him to do their responsibilities. Benson still gets mad at them, but not as much as before.
Both Mordecai and Benson are starting to gain more interest in each other, but Benson is way to busy trying to save his relationship with Pam, and Mordecai is too busy trying to avoid all of the wird thoughts in his mind.
But after a while they can't ignore it anymore, and at first everything is very sweet while they get to know each other more. But then it all takes a bad a sour turn.