On the Sundog, Grix is desperately fleeing Lux . . . and running out of fuel. On Duni, Vess wrestles with her spiritual doubts and the newfound knowledge that she is not alone. When she responds to the Sundog's mysterious distress signal, the unlikely pair will learn too quickly that there is no turning back now.
— Description from Comic Vine community (comicvine.gamespot.com).
