Dark energy is a hypothetical form of energy that scientists believe permeates all of space and keeps expanding our universe at an accelerating rate. But what if it also spans across universes in a wider multiverse, and what if in other universes with different laws of physics it can behave very differently and even give rise to unique forms of life? Eleven years have passed since the story in the science fiction adventure book Dark Matter. Earth and much of the Milky Way galaxy are now under attack by an unknown, destructive power, and the only way Marc Zemin and his highly advanced alien friends may be able to stop it is by sacrificing themselves for everyone else. Swept away into another universe of alternate dimensions, they soon find themselves at the mercy of a mighty enemy that continuously defeats and subjects them to one harsh punishment after another. As their willpower to survive slowly diminishes, so does any hope of their ever being able to return home. That is, unless they somehow find a way to fight back and make the startling discovery of who, or what, is behind it all and why.