Why couldn't the past just stay ... in the past? Where it belonged. Locked up in its cage in a bricked over vault where she'd thrown it when she'd arrived in London all those years ago.

Matilda Elizabeth Wentworth, the somewhat shy, craven teenager boarded the train in St Leonards-on-Sea. By the time it arrived in London, she emerged as Mattie Sutherland, a woman that refused to be told what to do, how to live, or who to love. Over the last decade, she's built a new life, created a new family, and she was happy.

Or was she?

A chance encounter with a travel vlogger has her questioning not just what it means to be happy, but what a good relationship looks like. And then she questions everything when she finds out she has a stalker. Is her new friend tied to this man that's following her around? The winter hols are bad enough, she doesn't need all this on top of it! And just when she thinks everything is going to be alright, her stalker shows up at the annual New Year's Eve do she and her best mate Ash have - and he isn't alone.