The book begins with Rose taking her guardian trials, enabling her to leave St. Vladimir's Academy as a qualified guardian. After passing her trials with flying colors and receiving her promise mark, Rose - along with Lissa, Christian, Adrian, Eddie and the other dhampir graduates - head to the Royal Court to begin life outside of the academy. Rose and Adrian are currently attempting a relationship after she promised him she would give him a shot after she got back from Russia in Blood Promise. However, after learning that there is a way Dimitri can be saved from being a Strigoi, Rose sets off on a mission with Lissa to break Victor Dashkov out from prison when she learns that only he can help them to find out how to turn Dimitri back into a Dhampir. After successfully freeing Victor with the help of Eddie and Lissa, they head to Las Vegas to find Victor's illegitimate brother, Robert Doru. As a Spirit user who supposedly turned a Strigoi back into a Dhampir, Robert tells them that the only way to save Dimitri is to charm a silver stake with Spirit and stab him in the heart. However, it has to be a Spirit user who does the staking. While in Las Vegas, the gang meets up with Adrian, who has tracked Rose down via credit card records. While leaving a casino, they encounter a large group of Strigoi, led by none other than Dimitri. Rose prevents Eddie from killing Dimitri because she knows there is a chance to save him. The gang narrowly escapes into the sun, leaving Dimitri to kill a bunch of humans and losing track of Victor and Robert in the process.
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Dimitri dio a Rose la última opción. Pero eligió mal ... Después de un largo y desgarrador viaje al lugar de nacimiento de Dimitri en Siberia, Rose Hathaway, finalmente ha vuelto a St.Vladimir's con su mejor amiga, Lissa. Es casi de la graduación, y las chicas no pueden esperar a que comienze su vida real más allá de las puertas de hierro de la Academia. Pero el corazón de Rose todavía sufre por Dimitri, y ella sabe que está ahí fuera, en alguna parte. Ella no pudo matarlo cuando tuvo la oportunidad. Y ahora sus peores temores están a punto de hacerse realidad, Dimitri ha probado su sangre, y ahora es presa de ello. Sólo que esta vez, no va a descansar hasta que Rose se una a él... para siempre.