A celebrity TV couple are busy with their joint fortieth birthday celebrations at the hotel. Anna assumes they are perfect together, but uncovers a very different story behind closed doors. Meanwhile, Sam learns the hard way that it is not easy running a hotel when he ignores Juliet's advice and allows rival boxers to stay at Babylon, and the staff rumble a corrupt environmental standards inspector.

Celebrity TV couple Erin and Ed Martyn are busy organising their joint 40th birthday celebrations at Hotel Babylon, as the drama set in a five-star hotel continues.

Anna assumes they are the perfect couple but discovers a very different story behind closed doors when she looks after their son, Tyler, for an afternoon. Ed and Erin seemingly have it all - the perfect child, the perfect TV career and a perfect marriage - but as Anna makes feeble attempts to ingratiate herself with Tyler, she realises that the Martyns aren't as perfect as they make out. In fact, they have a hate/hate relationship and Tyler is caught in the middle of their divorce plans.

Elsewhere, Sam learns the hard way that it's not easy running a hotel when he ignores Juliet's advice and allows rival boxers to stay at Babylon. Meanwhile, the staff rumble a corrupt environmental standards inspector and Anna names her baby's father - much to the surprise of her colleagues.