Ever since she was a schoolgirl, Louise has kept a secret, one she can't tell a soul, otherwise she'll find herself dead. She’s lived an almost perfect life since she met Tom and had baby Billie—until an arm washes up on the bank of the River Thames. It belongs to someone from her past… Detective Sergeant Colin Broadly is investigating the appearance of not only the arm but the rest of the body parts. He knows who the killer is and needs to hide any clues that point to Jonty Worth, a leader in another part of London. His investigation leads him to discover a young lad he wants to help, but does Mark want to be saved? George and Greg are looking for any excuse to get rid of Jonty, but someone else also has him in their sights and has done for some time… A mother, hiding the sins of her child. An evil teenager, taking whatever he wants. A girl, lost and alone after being stalked, desperate for someone to help her. But not everyone has a good side, and the bad might just be their downfall.