Struggling mum Sam discovers access to lucrative stock market information while working as a cleaner at Canary Wharf. Is this the answer to her spiralling debts?

Sam's money-making plan starts to bear fruit, but it comes at a great cost. Frustrated by her mum's constant absence and the new lodger living in her bedroom, Alice seeks refuge at her dad's house

While the investigation continues at the office, Sam and Jess are interrogated by the firm's compliance team. Jess admits to Sam that she has made a shocking discovery about Blake. Meanwhile, Alice starts to learn more about her parents' separation, and Dave drops a bombshell which further threatens Sam's relationship with the girls.

Terrified that her identity will be revealed, Sam navigates her way through the Network meeting. Sam ropes in Jess and Mina to help with her biggest scam yet, but things do not go according to plan. Elsewhere, Sam deals with pressures at home, as she tries to prove to her daughters how much she truly cares for them.

Swanny entrusts Sam to make a large investment for him. As Sam revels in her new persona, Dave starts to notice the change in her. Meanwhile, Jess and Mina are both put under pressure to come clean as the investigation into illegal activity in the office comes to a head.

Sam's world falls apart when her landlady returns with some devastating news, and she is forced to face the disastrous consequences of her actions. Coming clean to Dave could solve Sam's problems, but she risks losing her family. Meanwhile, Jess is left heartbroken when her business plan falls through. Season finale.