Centers on the inner workings of Engine 62, a New York City firehouse, and the personal and emotional battles of its members in a post-9/11 world mostly centering on Tommy Gavin, a veteran firefighter whose life is in turmoil as he copes with the stresses and fears of his job as well the separation from his wife Janet. Tommy moves into a house across the street from her to stay close to their three children and keep an eye on her.