Callie was born with a bad heart. After it ruined her life, she went looking for a miracle: a heart transplant. Now she s got a brand new heart, but she s still stuck with a crappy job, crappy boyfriend, and crappy prospects. Enter Mercer, a mystery man who gets Callie s heart beating like crazy. As her behavior changes and their flirting deepens, Mercer reveals he s her heart donor. Only Callie can see, speak to, and touch him - and he s in love with her, a love she feels just as strongly. A master thief when he died, Mercer offers to teach Callie his criminal ways and how to turn them against her old job and kick off a nationwide crime spree. Hunted by the FBI and popping heart meds to stay alive, Callie will find out that nothing s as scary as two people in love with nothing to lose."

Callie tried to go straight. She escaped both Mercer and the FBI to Canada. She got a new beau, a new job, and with the few years remaining on her borrowed heart, everything should be perfect. But Callie’s old life isn’t entirely done with her. As her old crew keeps robbing and sucks her back into the one thing she’s great at, Callie sets out to create a criminal empire of her own.

Heartthrob Vol. 3 concludes the wild story of Callie Boudreau who undergoes a heart transplant and embarks on an unusual and unforgettable relationship with the criminal whose heart she just received. Callie was born under a bad sign. After checking out of her criminal ambitions, Callie has checked into a mental hospital to finalize her break-up with Mercer—the dead criminal who donated the heart that gave her a new lease on life, only to steal it back in a cross-country robbery romance. But after convincing herself he’s not real, Callie has shaken her delusional beau and begun moving on when she gets a visitor: Mercer. With a year left on her new heart, her world upended and her friends and family threatened by this real-life version of her dream boyfriend, Callie busts herself out and dives back into her life of crime. As she ties up her loose ends, Callie sets out to make peace with her past, figure out her future—and find a way to make this break-up permanent.