While Sam is away on a tree-hugging retreat, Andy and Errol are offered the opportunity of a lifetime - to sign with Rage Records and infamous music producer Mo Kahn. Little does Andy know that Mo is only interested in the kid and Errol hasn't worked out how to break the bad news. When a series of seemingly innocuous events puts Errol in mortal danger and the whole custody case in dire jeopardy, can irresponsible screw-up Andy finally make it right?

While Sam is attempting to attract a cool new sponsor and Errol is away on a school trip, Andy is trying to break up with Shelly, make up with Gwen and woo Errol's teacher Melodie. But can Andy really juggle three women? With Errol on the phone trying to be his conscience, Andy takes things to farcical extremes to try to have his cake and eat it too.

Errol's paternal grandmother Joan is hosting a family lunch and Sam ropes Andy into coming along for moral support. Unfortunately it's just as Errol's 'cool uncle' Rex arrives home on holiday, and Andy embarks on a competition to win Errol's sole affections. Sam and Ben hit a snag in their custody battle, someone's got a crush on Errol, and Andy doesn't know how to deal with Joan after she reminds him of 'that night'. The scene is set for a delightfully tense day at grandmother's house.

Sam is mortified when Errol catches her in an embarrassing position, while Andy is horrified when Val Pearson catches him spying outside his club. Andy holds auditions for his new band so he can enter the Battle of the Bands competition at Val's club, meaning he can spend quality time with Gwen. Errol and Andy have a man-to-man chat about the opposite sex, and Sam goes on a string of disastrous dates. Andy escorts Errol when he takes Ruby on a date, and bumps into Melodie. Andy recruits a surprise new band member and they play at Battle of the Bands.

Having been moved on whilst busking, Andy's day goes from bad to worse when he calls round to Gwen's flat and meets her new boyfriend, Casper. Sam has a meeting with Errol's dad Ben to discuss custody. Andy persuades Errol that, for a variety of reasons, he really should go to Alfie's birthday party. At the party, Andy meets old school friend Shelley, but gets bullied by Alfie's dad, Tom. Things go horribly wrong and Andy, Errol, Bruce and Tiffany have to make a run for it.

After reaching rock bottom, failed rock star Andy finds new direction and purpose in his life when he becomes the unlikely charge of nephew Errol.