Two months have passed since Ember Lyons nearly died killing the powerful Root Demon threatening the Los Angeles Gateway. Physically healed, images of the day still haunt her and she can no longer access the power she once wielded. She can't talk about it with anyone at The Institute—not even her handsome, demon-hunting boyfriend, Taren. Besides there are bigger things to worry about: Gateways around the world are weakening, Keepers' Marks are fading, escaped lesser demons are populating Los Angeles, and it looks like the Root Demon wasn't alone. When the Institute sends Ember and a team to Europe, she hopes to find answers and security on the journey, but another attempt on her life reminds her she's never really safe. Then she's thrust together with the mysterious Alexander. Ember can't be sure if this charismatic man is her most formidable enemy or greatest ally. Either way, she needs him, because he's the only one who can bring her to... the Chasm.