An alien species contacts Earth saying that they are journeying across the galaxy to make formal contact with humanity. Their interstellar starship crashes on Mars and an Earthship is dispatched to attempt a rescue. On Mars, they locate the downed spacecraft, but only a single dead alien humanoid is found aboard. They determine that an alien rescue shuttle left the Red Planet but crashed on nearby Phobos. A strange, green-skinned woman is found alive aboard the shuttle's wreck. As they head back to Earth, the crew begins to die, drained of their blood.