Elena Gilbert's lover, the vampire Stefan Salvatore, was captured by demonic kitsun spirits rampaging through Fell's Church. They cunningly imprisoned him in the Shi-no-Shi prison. Elena's friends Bonnie and Meredith are left to fight the evil that has settled in their city. Elena herself goes in search of Stefan.

In order to find him, she entrusts her life to Stefan's brother, Damon, a handsome but deadly vampire who wants to take possession of Elena, her soul and body. And make her your Princess of Darkness. Together with Matt, Elena's childhood friend, they go to the slums of the Dark Dimension, where Stefan is imprisoned. Rumor has it that in this world, vampires and demons move freely, but people live as slaves to their supernatural masters...

Elena will stop at nothing to save Stefan. However, with each passing day, the tension and mutual attraction between Elena and Damon grows, and she is faced with the need to make a difficult decision: which of the Salvatore brothers does she really want?

Staying at Fells Church, Bonnie and Meredith did some hard discoveries. They try to catch up with Elena and warn her, only to plunge into the most dangerous adventures with her.