Detective Samantha Easton has always thought of herself as an adaptable person. But when she nearly dies after being shot on the job, Sam discovers something totally at odds with her rational, analytical personality: she can now see the spirits of people who have died, and she's not finding it easy to adapt.

As if the sudden appearance of ghosts on the streets of Boston and her dead great-grandmother's curious questions about her love life aren't enough, Sam is being haunted by a mystery woman. This beautiful ghost, Mae, has no memories and is unable to move on from this life to whatever comes next - and she wants Sam to solve the mystery of her death.

Sam readily accepts the case, happy to get back to doing what she does best. There's only one problem: falling in love with Mae wasn't part of Sam's plan.

As the two women unravel Mae's secrets, they fall deeper in love with one another...but how can a ghost and a living person live happily ever after?