Deb Connolly drowns after falling overboard on an afternoon sail and her husband commits suicide two days later. Annie Beckwith is distraught over the loss of her sister and her sister's husband, and tries to get on with her life. Chief Joe Silva and the other authorities don't doubt the report of Deb's sailing partner, Cecily Harris, a woman known to be afraid of the water and unfamiliar with sailing. But a sharp eye at the marina where the sailboat has been dry-docked discovers evidence of tampering with a key piece of equipment, and the accidental death no longer seems so obvious. In the...