11-year-old Harry Carter creates Honc, a phone app that helps geeky kids like him talk to girls. The app becomes the next big thing and an American billionaire buys it for 10 million pounds turning the Carter family's life upside down.
The family get news of their windfall and Tony tries to retain some sense of normalcy by continuing plans for family bonfire night.
As the Carters adjust to their new lifestyle, Ellie begins to embrace her celeb status and Liz upgrades the sofa.
Eager to teach him the value of money, Tony invites Harry to join him at work. Meanwhile, Liz and Ellie go shopping for a new mansion but are caught in a sticky situation.
The family faces a collision of worlds when billionaire Trent comes to stay, bringing a gaggle of attentive assistants.
Concerned that Harry needs a break from technology, Tony signs the two of them up to the Wildboys' Wilderness Survival Group.