Charlie is a well-to-do bachelor with a house at the beach, a Jaguar in front of the house and an easy way with women. His casual Malibu lifestyle is interrupted when his tightly wound brother, Alan who's facing a divorce, and Alan's son, Jake come to stay with him. Together, these two and a half men confront the challenges of growing up; finally. Complicating matters are the brothers' self-obsessed, controlling mother, Evelyn, Alan's estranged wife, Judith and Charlie's crazy neighbour Rose. who wants to be a part of his life and is willing to do anything to be around.