Based on the true story of Britannic, the sister ship of Titanic, which sank under mysterious circumstances during the early days of World War 1. A romantic spy thriller which follows the events surrounding the fateful voyage of the Britannic. The ship is commissioned as a hospital vessel for wounded soldiers. Everything is not as it appears onboard the great ship, as a beautiful British secret agent posing as a nanny will soon discover. She must confront the sceptical commander and the double agents in a delicate and harrowing attempt to discover the dangerous truth of Britannic’s last voyage.