A fall through time. A reckless witch. A war of monsters. 17-year-old witch Desiree Campbell tries to cast a spell to go to Miami for spring break. But she ends up in Cuba a hundred years in the past. The year is 1898. The Spanish-American War rages. Demons thrive in the city, preying on humans. Desi is caught between the war of mortals and the war of monsters. She meets Oliver Gerrick, a handsome American soldier and warlock. He offers to help her fight off demons and find a way home. But the path to returning back to her own time won't be easy. Demons attack, hungry for blood. And Desi suddenly finds herself targeted by a powerful demon lord. He knows she's time-traveled. And he wants to keep her trapped in 1898 forever.

It’s been six months since El Diablo’s disappearance, but Desi Campbell still has nightmares. Still adjusting after time-traveling, Desi hunts demons with her coven in 1899 Santiago. Then she hears rumors that El Diablo is back—and he's in Manila, where Oliver is fighting in the Philippine-American War. She travels there to warn him. A heart-crushing secret is exposed. Familiar faces resurface. And Desi is faced with dark magic she's never known before. Demons stalk the city, preying on civilians. Desi is torn between protecting innocents and finding El Diablo. She continues fighting, until she finds herself surrounded by demons who practice the darkest magic. But Desi will do anything to protect the ones she loves. Even if it means pledging herself to darkness forever.

This thrilling conclusion to Desi Campbell's journey provides the answers she has yearned for since she first time traveled. The secret to why she was called to Santiago in the first place. Finally back in her own time, Desi seeks out the friends she never thought she’d see again and joins their cause to fight the unstoppable demon lord Levarret. Then Desi learns that Levarret has more to do with her past than she realized. And he's targeting Oliver, too. Desi will do anything to protect Oliver. But when a spell is uncovered that can defeat their enemy once and for all, Oliver may have to pay the ultimate price for them to succeed. War rages between the rebels and Levarret. Disaster strikes the city, threatening the lives of thousands. Love lost. Death conquered. A demon master unleashed. This book concludes Desi and Oliver's story and has a happily ever after.