When an inmate is found unresponsive in his high security cell at Belmarsh prison, he’s rushed to hospital for treatment. The prisoner is human trafficker and international fixer Tristan Huxley, a man a lot of people have good reason to want dead. But Huxley mysteriously never makes it to the hospital. He may have plenty of enemies but it seems he has some very powerful friends too.
The friends can’t believe their luck when they get the chance to stay in a castle for their Easter holidays.
The castle is everything they had hoped for, with a moat and an ancient burial mound that gives it an air of mystery. But things are not what they seem and a treacherous discovery in the grounds reveals a 300-year-old treasure map.
The race is on. The After-School Detective Club is in pursuit of Ragnar’s gold – a hoard of treasure said to have been buried by a Viking warrior and guarded by his demon hound… that is, unless someone else gets there first.
They may seem an unlikely gang of friends, but when they spot a ghostly figure walking the beach one winter’s evening, they are thrown together to unravel a mystery that none of them expected.
The deeper they dig, the bigger the adventure becomes – motorboats, tracking devices, bedroom breakouts and daring sea rescues are all in a day’s work for the After-School Detective Club. And when their investigation leads them into trouble with the police.