Belle introduces us to herself and her world. She's a high class escort who enjoys what she does but has to keep it a secret from everyone in her personal life. Even her best friend Ben thinks she's a night time legal secretary. Belle explains to us that it's crucial for escorts to find out what their client likes – and give it to them. Quickly. Which she demonstrates with a first time client who's too shy to admit that what really turns him on is the idea of having sex near over-excited horses in their stables. But Belle finds it out and takes him through his fantasy. She's thrilled with herself as she sends home a happy customer.

Sometimes Belle's job takes her to places she's always wanted to go…tonight she's being taken to London's most prestigious sex party by a new client - Aleksandar. It's an incredibly glamorous event, Belle's dressed in a black wig and everyone looks hot. Belle can't wait to get down to the main event…which is an orgy in the party room. So she's disappointed to hear that Aleksandar has other ideas. What he really wants is for everyone in the party to want Belle and for Belle to get very turned on…but for her to wait for him…and only he will get to have sex with her back at home. When Belle sees someone she recognises - Jay Lorre - her all time favourite author, and they really hit it off, she tries desperately to shake Aleksandar off.

Belle is on her way to an 'all nighter'. The client has booked her for the whole night and so it's important that she manages her time well. Belle tells us that apart from the sex toys, the most important piece of equipment she needs is a watch. She greets Ashok, a regular client she's very fond of. After a drink they have sex and Ashok soon nods off. Belle gets bored. She explains she can never sleep on an all night job so she has to find other things to do to while away the time: call Ben who thinks she's calling bored from the office; read a book; rearrange the hotel fruit bowl. But after a while she's stir crazy so she goes down to reception. When she goes for a drink in the bar, she's approached by a man who works out she's an escort. And he asks to book her. She can't, can she?

Ben and Belle go for a run. He tells her he's getting married to his girlfriend, Vanessa. Belle's hurt; he's been engaged for weeks without telling her. When a good client, Belle's accountant Larry, says he'd like to try S and M, she decides to give it a go. She meets a professional dominatrix who shows her the ropes (literally). Using her slave as an example, the domme teaches Belle how and where to use a whip and how to treat the client. She gives Belle an insight into the world of S and M.

Shopping for his wedding suit with Belle, Ben is still reeling from her recent revelation. Hurt that she never told him, confused by what it means, there's a frostiness between them. Belle explains that she's got a threesome booking that day – Ashok, her regular client has decided he wants two girls this time. Belle's a little nervous. It's not that she doesn't like having sex with women, it's just that she doesn't get on that brilliantly with them. She meets Naomi, an older, much more experienced escort who takes her in hand.

Belle receives a bad review on the internet and as a result her work drops off and clients are thin on the ground. So she accepts a booking at midnight – from an ordinary seeming guy – who once he's inside the flat turns very scary. Ben tries to make her see that what she does is dangerous. He asks her to take a break from work to get a bit of perspective. But the break is boring – she doesn't like the look of normal life and doesn't know how to spend her time.