The story follows a down and out, gambling addicted cleaner who accidentally overhears some illegal insider trading and decides to get in on the action. This throws her into a world she doesn't understand and where she is out of her depth - facing up to corporate types, petty debt collectors and dirty gangsters.
The main character is painted as sympathetic, but she's often obnoxious. She cheats, lies, steals, and often ruins every chance she creates herself. Her journey is frustrating to watch, as she regularly brings her friends and family down with her on the way. She is absolutely an antihero, and if you see her that way, I found her quite interesting. I wish her portrayal was more gritty, as it's clear the filmmakers want us to root for her - but often you don't want to.
She's also quite inconsistent - sometimes helpless and hapless, sometimes a strategic genius. From one scene to the next it can be hard to believe she's the same character.
Instead the side characters really are the heart of the show - her kids, estranged husband, friends, colleagues, and even her local shopkeeper show more heart than her, and it's those you mostly care about.
The whole thing is too long and stretched out - it could have been 3 episodes comfortably. The writers create drama to fill in the extra time, which was unnecessary. But I was interested enough in the central dilemma to not be bored.
The story gets increasingly implausible as it goes, but not more than most TV dramas. I still found it entertaining, even when I had to suspend disbelief. The "normal people vs the 1%" dynamic sometimes showed real promise and had interesting things to say, sometimes was a little shallow and patronising.
Overall, I wish it was shorter, and I wish they had embraced the moral ambiguity of the main character more. But I found the core idea compelling, and am glad I watched it. Still better than most things on ITV or Netflix.