Aubrey Hunter is a university student who has a dark part of her hidden past emerge. Her transfer to Maine University, following her sister, Lara, turns perilous and brings to the surface dark dreams when she comes in contact with a small group of powerful individuals who are immortal. She has sworn to her sister and her best friend, Maristela, that those dreams from her childhood are behind her and and she no longer believes such beings exist. But these immortals believe she exists and they are hunting her for what she is.
A civil war has erupted in the immortal world as the balance of power has changed. The Watch, a mortal male, holds the power of judge and jury over the immortals, but he has disappeared. In his absence, some immortals have discovered new powers, which include the unspeakable ability to kill each other. Two of the most powerful immortal brothers, members of the Bancroft dynasty, face off on opposing sides. Each focuses his strategy on Aubrey as they acknowledge her role in deciding the victor.
Aubrey is instantly drawn to Ephraim, who claims he would protect her, but she is quickly disillusioned as she slowly untangles a web of lies and betrayal. Is it too late to join Xavier? Has she made the wrong choice? Does she need either of them? Only through trials of hardship and moments of greatness will Aubrey unlock her power as the first female Watch, in order to save those she cares about.