Legit is about a comedian, Jim" and his misguided attempts to become legitimate in life. He is encouraged in his quest by his best friend Steve, and Steve's brother Billy.

Jim is outed as a sex addict on live radio as the second season of "Legit" kicks off. Later, Billy tags along when Jim and Steve attend their high-school reunion, the guys visit a water park with their dads, and Jim entertains soldiers in Afghanistan. Bob Saget, Carrie Fisher and Tom Arnold make appearances along the way.