Though unmentioned, the spectre of the Great War looms large over the 1918 Danish film Himmelskibet. Called A Trip to Mars in its English release, it begins as any self-respecting Scientific Romance ought: a daring adventurer sets out on a celestial expedition to Mars, facing down derision and disaster in his quest for scientific truth. When he and his crew arrive, they encounter a pacifist utopia custom-made to counteract the horrors of the conflict ravaging Europe at the time.
The hero of the story is Captain Avanti Planetaros, late of the marine corps who has taken up aviation as a hobby. His sister, Corona, is romantically entwined with Avanti's friend, the scientist Dr. Krafft. Their father is Professor Planetaros, an astronomer who gazes longingly at the Red Planet through his attic observatory. Their nemesis is Professor Dubius, friend of their father and inveterate cynic. While flying one day, Avanti is seized with the idea of creating a flying machine that can take him and stalwart crew to Mars. Other than Dubius living up to his name, nothing stands in their way and they are soon off on an expedition.
Six months out, while those left behind on Earth wonder if they have survived at all, the space madness infects the crew. Some have turned to drink and there is talk of mutiny to take control of the ship - named Excelsior - and turn it back around to home. Before they can affect their plan, a ray from Mars captures the ship and it is sped to the surface of the planet. There, the crew encounters a veritable paradise and its highly enlightened citizens.