A cunning killer. A race around the world. An iconic new detective team is born. Solving murders. It's a family business. Steve Wheeler is enjoying retired life. He still does the odd bit of investigation work, but he prefers the pub quiz and afternoons at home with his cat Trouble. His days of adventure are over - that's his daughter-in-law Amy's business now. Amy Wheeler thinks adrenaline is good for the soul, which makes being a private security officer to billionaires the perfect job. She's currently on a remote island keeping world-famous author Rosie D'Antonio alive. Then a dead body, a bag of money and a killer with their sights on Amy have her sending Steve an SOS... As a breakneck race around the world begins, can they stay one step ahead of a deadly enemy?