Carefree jingle writer Charlie Harper has his lifestyle altered when his uptight brother and his 10-year-old nephew move in with him.

Charlie must make a difficult decision about his future and with which woman he wants to spend his life: Chelsea or Mia.

When Chelsea convinces Charlie to let Alan's new girlfriend, Melissa, move in, the girls end up taking over Charlie's house.

Jake is taught the art of infidelity by Charlie, while Celeste is away for Christmas.