When Murray Tranter and his spoiled daughter Rochelle go on holiday to La Palma, unforeseen circumstances force Murray to hire Alexandra Fox, a young drifter with a turbulent past, to keep his daughter safe while he's away on business. It isn't long before Alex discovers that looking after Rochelle is a much tougher job that she bargained for as arguments and tensions reach epic levels between the two of them. Events take an even more sinister turn for the pair when they find themselves embroiled in a terrorist plot to trigger a mega-tsunami which could spell disaster for the East Coast of America. Ridiculed by those they try to warn, Alex and Rochelle are left with only one course of action; to take matters into their own hands and attempt to stop the plot themselves. Dragged into the labyrinthine caves inside on the La Palma's many mountains, surrounded by gun-toting terrorists at every turn, this time even Alex may be in over her head. Forced to overcome their differences and rely on each other, the unlikely pair soon realise that what they've stumbled on is bigger than anything either of them have experienced before. Both are determined to prevent the tsunami from being triggered, but with only a couple of hours to go before the plan comes to fruition and enemies at every turn, there's a very good chance that they'll be dead long before the clock stops ticking.