In our darkest hour

World War II is in full swing, and Captain Alan Lee and the crew of the cruiser Preston are on the front line. Escorting convoys of troops and precious cargo, Preston is called upon. Facing the wrath of the enemy air force, relentless air raids and the stealth of the U-boats, Preston and her crew never waver from their orders - always pushing on. Despite being outnumbered, out-gunned and sometimes out-manoeuvred, coupled with issues of ammunition and supplies shortages and rookie crews, the captain and crew show courage and resilience, continuing to fight for comrades, king and country. Staring life and death in the face every day, the crew and Lee experience euphoria and sorrow, exhaustion and reward as they tirelessly keep the shipping lanes open - but at what cost?