Résumé: During World War I, Angel was driving an ambulance with wounded soldiers when he was attacked by a German airplane. The ambulance was destroyed and the soldiers died, but Angel of course survived.
Six weeks earlier, Angel was in New York City and he read in a newspaper of German forces having been drained of there blood and a mysterious symbol found at the scene each time. Angel broke into a public library to research the mark and found it belonged to a vampire. Angel decided to go back the european mainland, so he hitched a ride on a transatlantic boat. The boat was shot down by a U-boat however and while the passengers were in the water, the German soldiers shot at them. Unbeknownst to them, Angel snuck on board their submarine.