Fourteen-year-old Hollie has always lived in the small town of Loweburgh on the south coast. When she and her best friend, Parker, start researching repairs to the sea defences, they find that low grade steel has been used to protect the town walls. If there was a terrible storm, bigger than anything recorded so far, the sea defences simply wouldn’t hold. Not only that, but the steels were put in by local engineering firm, Mayes Cranston, where Hollie’s mum works. When the company needs a fall guy, Hollie’s mum is fired. Then unseasonal, catastrophic rain starts to fall. A tsunami is on its way and Loweburgh is directly in its path. Helped by her friends, Hollie has to risk everything to try and save her family whilst proving her mother innocent of all charges.