Lee's former flatmate Kate has moved back to America, so Tim decides to sell the flat. Faced with homelessness, Lee announces he'll buy the flat himself and sets to work putting off any other prospective buyers, including Tim's sister Lucy. Things get worse when Lucy puts in an offer on the flat and Tim is forced to decide where his loyalties lie.

Lee is becoming increasingly riled by Guy's constant presence in the flat, and his distrust of him is fuelled by the discovery that he runs a lap-dancing club.

Meanwhile. Tim finally seems to have found a girl who he really likes, and of whom Lucy approves. The perfect girl... until Tim finds out what she does for a living.