As a powerful insurgent army closes on Liberia’s capital, London is forced to act, and HMS Beaufort is dispatched to West Africa to pull British nationals from the teeth of encroaching danger.

But when the volatile situation ashore unravels, the frigate’s crew must draw deep on reserves of skill, ingenuity and sheer bloody mindedness to save it. And with time running out Beaufort’s Captain makes the decision to take his ship up river …