the basic premise is that a giant weed is growing out of control in the world’s waterways, and as it covers more and more of the earth the resulting chaos and global warming is decimating life as we know it. coastal cities disappear, japan sinks into the sea – soon the earth will be uninhabitable. benbow is a scientist who travels from africa, to england to mars. of course while there he gets homesick and wants to return to earth to find his girl. so he does, only to find that things aren’t as they appear.