Murder is never smooth sailing...

Charlotte McLaughlin assumes she's finally shed all her tears on the first anniversary of her husband's passing. After all, she's living in his luxury suite on a private cruise ship, visiting exotic ports, and living her best life with her sister, Jane.

Certainly, she done with murder mysteries, too.

Then, while docked in New Orleans, Jane reunites with an old crush who—surprise!—joins their cruise. He's an odd duck with an obsession to write a book about Louisiana werewolves, and it's turning the sisters' companionship into a snarling catfight. It's almost a relief that Emmett is the prime suspect when a trumpet player booked as a headliner for this sailing is silenced forever by a silver bullet to the heart.

But the band members themselves also had plenty of reasons to seek their leader's death, and Jane stands by her man, leaving Charlotte alone again. Is Charlotte merely hoping Emmett is the killer so she can hang on to her new normal—or should she risk a permanent rift by pursuing her hunch to protect Jane's life?