Jez has discovered he's a musical genius with his new opus "I'm Dangerous", and Mark is Lord of the bus after meeting his office crush Sophie, on the double-decker home. However from great beginnings, it all goes pear-shaped. The gloves are off when Toni invites them both to a party, where we find out who gets to be Toni’s fuck buddy, who runs the music 'biz', what happens when a man taunted by chavs finally snaps, and who is the cockmuncher.