The Battlecruiser — in their time this class of ships was considered one of the great triumphs of the Royal Navy, as swift as a destroyer but packing a deadly firepower equal to any ship afloat. But the ships had one fatal flaw: their armour could be pierced by a single enemy shell. The Battle of Jutland exposed this Achilles' heel, then further disasters followed in the next world war with the tragic sinkings of the Hood and Repulse.

1943 — Of all her class, HMS *Reliant *and one other have survived. Reliant has the reputation of a lucky ship but when Captain Guy Sherbrooke joins her he knows he could be her last captain. As Britain prepares to invade occupied Europe, Reliant will be thrown head first into the conflagration. All those who sail in her know that there can be no half measures: only death or glory awaits HMS Reliant.