After an accident in space Jay crash-lands onto a strange world. He is rescued, but enslaved and after many adventures he manages to win his freedom and together with his new wife starts life in his adopted land.
While visiting relatives of his wife, their son is infected with swamp fever and lapses into a coma. Jay takes him to see the Regal of Mordia whose surgeons diagnose the fever as the Sleeps. The only cure is a medicine made from a tree root, but it comes from a land far away... The Ruler of that land gives Jay the cure on the promise that Jay will return and seek replacement medicine.