When a young woman tragically falls under a train on a busy platform, DCI Kevin Greggs is faced with the heartbreaking task of delivering the devastating news to her boyfriend, who was eagerly awaiting her arrival at a romantic Valentine's dinner. A year later, another one of Brett's girlfriends suffers the same type of tragic accident.
DCI Greggs senses that something is wrong with these mysterious deaths, and when he discovers that one of Brett's girlfriends has gone missing, he realises it's imperative to uncover the truth. Teaming up with Dr. Ethan Quinn, they embark on a relentless pursuit into Brett's life, determined to unearth the dark, hidden secrets he has desperately tried to bury in his past.