Andy has grown up living in a space station, one of many filled with Human occupants that were forced to leave Earth when the Trulonians arrived. On Earth, there is a growing resistance of Humans working against the Trulonians. In an effort to bring unity to the two races, the leader of the North American Trulonians, Oslo, calls upon the Commander of Andy's space station to send a Human girl to Earth for a plan he believes will help in his efforts. Being in the wrong place at the wrong time, after a dangerous stint in space walking, Andy is sent, unwillingly, to Earth. Andy first meets Leo, who shatters all expectations she had of the Trulonians she'd meet on Earth. Quickly, Andy learns she'll be spending a lot more time with Leo, and his three brothers, for reasons she never saw coming.