The Unit is an organization of the US Army, which can be compared to Delta Force. Colonel Tom Ryan is in charge. The unit itself consists of Sergeant Major Jonas Blane and his Sergeants Mack Gerhardt, Bob Brown, Charles Gray and Hector Williams. Their work is top secret, so even their wives don't know what they're doing. From 2009 a new team member named Sam McBride has been added, he is the youngest member of the unit. The Unit is about their missions abroad and the impact this has on their lives, wives and girlfriends.