She's no stranger to ghosts. But love? That's a mystery.

Historian Susannah Darke is no stranger to haunted houses. As one of a trio of ghost-hunting sisters, she's had plenty of experience investigating the paranormal. When an opportunity arises to explore a haunted opera school in Toronto, she jumps at the chance, even though she once had her own frightening brush with its resident ghosts.

Noah Bellamy is the dean of the Asch Institute of Opera, and a former opera singer himself. He was once a student at the Asch and is well acquainted with its boisterous spirits. But when the activity worsens, threatening one of his star students, he knows he has to take action.

The fact that Susannah and Noah have been hooking up for the past year complicates things, but they agreed long ago to keep things casual. As long as they both remember their boundaries, the investigation should go smoothly.

When the paranormal activity begins to target them personally, it becomes harder not to seek comfort in each other's arms. For the first time ever, Susannah and Noah have to decide if it's worth taking a chance on love.

The ghosts present a huge challenge, but battling their personal demons may be even harder...