Much to Kara’s horror, a horde of demons is released into the mortal world, through the Mirror of Souls. Thousands of human souls are dying every day. The Guardian Angel Legion works relentlessly at trying to secure the mortal world from Demons. But when Kara discovers the truth behind the Demon Lord's plans, can she return to Horizon safely and warn the Legion before it's too late?
As Kara settles back into the world of the living, she gets an unexpected surprise and finds herself back in Horizon—the Legion has given her a second chance. Kara and her friends face a new enemy: a Dark warlock, an ancient and evil adversary of the Legion. What’s worse, the Legion orders Kara to carry out her new mission undercover, as someone she never expected...
Kara had only just begun to enjoy her life as a mortal with David—when they are pulled back suddenly into the world of the supernatural. The Legion has made an important discovery: a new Elemental child, whose whereabouts are unknown. Kara and her friends embark on another dangerous journey to seek out this child. But is this kid really an Elemental—or something else entirely?
When seventeen year-old Kara Nightingale is suddenly struck by lightning and dies—yet again—she finds herself back in Horizon. Hunted by the Legion, Kara takes refuge with a new band of angel friends. And when Kara decides to venture into the Netherworld to find her mother’s missing soul, will her powers be enough to save her mother and save the mortal world?