Becky and Jamie are an ordinary hard-working couple trapped in the daily grind, dreaming of an easier life. On one of their rare vacations, they meet Phil and Mel, a wealthy couple who seem to have it all—they're fun, well-traveled, and very generous with their money. But they are also very, very dangerous. Phil and Mel are not who they say they are, and this is no random vacation friendship.

Two days ago, the Wilson family checked into the imposing, glass-fronted Lodge, surrounded by snow and perched perilously on the edge of a cliff looking out to a gray sea. Not everyone was looking forward to the family get-together. But mother-in-law Angela insisted the winter trip would help heal their rifts....

I’ve been on edge the whole time because 15 years ago when we were living in this city my husband Jack did something that ripped our lives apart. I swore I would never come back here, but Jack insisted. One afternoon, in the blur of a crowd, I lose sight of my son. I can’t find him anywhere. Frantic, I call my husband. But what he tells me next shakes me to the core....

Sarah is in a loving relationship with Paul, a man she hopes to one day marry and start a family with, until his untimely death turns her world upside down. Trying to come to terms with her loss, Sarah finds comfort in looking through Paul's old things, including his laptop and his emails. But Sarah begins to discover things about her late partner that she never knew before, and it seems he wasn't as perfect as she thought. As she unravels more about his secretive past, she ends up learning things that not only break her heart, but that the police would be interested to know too.

Marianne has a life others dream of. A beautiful townhouse on the best street in the neighbourhood. Three bright children who are her pride and joy. Sometimes her past still hurts: losing her mother early, growing up in foster care. But her husband, Simon, is always there. A successful surgeon, he’s the envy of every woman they’ve ever met. Flowers, gifts, trips to France: nothing is too good for his family. Then Simon says another woman’s name. The way he lingers on it, Caroline, gives Marianne a shudder of suspicion, but she knows it’s nothing - she can’t entertain this flash of paranoia.