Siren is an artist of all trades who fills her time with creation and performance. Zander is an adventurer who is always on the hunt for new challenges and undiscovered wonders. Both are solo acts, beings who make their own way through life and never settle for long in one place or with one person. Both are also immortal in a universe where living forever is a privilege held by very few.

After a chance meeting and a planetwide catastrophe, Siren and Zander agree to work together in an effort to set things right. But when a simple mission goes wrong, these two independent souls might learn that sometimes, even an immortal needs someone else to lean on.