Shapeshifter Xander will remain stuck in oblivion between good and evil until he is marked—either with the sphere that will identify him as a servant of the underworld or with the water mark, working for the keepers of humans, vampires, and warlocks. One decision will mark him and his twin sister Mira equally. She is in love with a man bearing the water mark and wants Xander to follow the path of the good. But Xander loves a black witch, a minion of the underworld. All he has to do to join her forever is kill. After all, there's something good about being bad

Sarah killed her human mother shortly after she was born to quench her thirst. She hates her vampire father who she never met and blames him for her mother's death. Now twenty-one, Sarah suppresses her dark side with serums. When a nightmare stirs her superhuman traits, underworld creatures hunt for the half-breed vampire. On the run, Sarah learns what’s been hidden from her, for a good reason. Had she known her destiny, she may have continued with the serums that kept her safe in the human world.

Half-breed vampire Sarah has married her other half, William, and is now the mother of three-year-old twins with power that defies explanation. Aseret, the demon lord of the underworld, views the twins as a threat to his taking over the world. Sarah, William, and their shapeshifter friends must train the supernatural kids to prepare them for an inevitable encounter against Aseret. For Sarah, training isn’t enough and she relinquishes her body to a witch—the one who stole it before. Roaming the underworld as a ghost, Sarah searches for Aseret’s accomplice, before Aseret kidnaps, or worse, kills her children. But reconnecting to her body may be more difficult than Sarah expected. After all, there’s only space for one soul in a body, and they’re one body short.

Eric is an evil-bender punished by his superiors for defying them. He followed his instinct and removed a mark off a cursed witch without consulting them. With his days numbered, Eric struggles to follow his last task: an order to kill the last three demons, so that his abilities and memories can be stripped. The life as he knows it, including his love, will be taken away from him. But an offer from the last standing warlock sways his loyalty. If Eric tries to kill him, all power will be transferred to the warlock instead. If he doesn’t, he will die. What choice do you have when any choice you make is not your own? After all, a deal with a warlock is as true as the best lie.