When the drone came back there was only a paper bag in the hold, "Overwinter-1" written on it in pencil. The research station's message arrived almost at the same time: "It worked. But only one plant survived, so this is the only seed we can spare." "This variety needs enormous amounts of fertilizer, far more than anything you've grown. Feed it a full dose of topdressing every round once it's planted." "Don't use raw soil. The rest is up to you."