Chicken Rock

The Irish Sea is cold, swarms with stinging Lion's Mane and Portuguese Mar O' War jellies and, to add to its ruthless reputation, there's an amphidromic point just south of the Isle of Man which is rife with some of the most dangerous and violent sea currents in the world. Not the sort of place you'd want to go for a morning swim, you would think. But tell that to DI Sarah Flemons and DC Penny Chakyar. It's just the sort of challenge they love - until the inevitable happens.

While their frie...