There are a lot of things that pop-culture aficionado Melanie Hoffman is great at: rattling off storylines from The Real Housewives, reciting the Mary-Kate and Ashley Olsen filmography from memory, and quoting Gossip Girl like it's The Godfather, to name a few. And then there are the things she's not good at: maintaining a healthy work-life balance, sleeping (in general), and being a functioning adult who isn't completely destroyed by the death of her best friend, Ari. Mel has accepted that nothing will ever fill the crater-sized hole that Ari's absence has left behind, and the cork on her grief is stopped tight. But then her company requires Mel to take a mandatory vacation. Cue the explosion. Desperate to avoid two weeks alone with her thoughts, Mel joins her friend Vish on a yacht trip in Greece chartered by his tech company. It's the Below Deck fantasy of Mel's dreams, with built-in quasi-celebrities to fixate on in the form of the posh co-founders of Vish's company. Mel has done enough social media stalking to immediately typecast the fabulous yet fragile Freya, her arrogant boyfriend Seb, and the hardworking and humble Ollie. A luxurious yacht chockful of hot, rich Brits? Mel couldn't dream up a better distraction from her sorrow. But Mel's dream quickly plunges into nightmarish waters when a sinister conversation overheard in the dead of night convinces Mel that Freya is in danger.