Hours after salvaging a huge cache of silver coins from the Santa Anna shipwreck and arguing with rival treasure hunter Newton Farrell Tosh Walker is stabbed to death on Newton's boat and his corpse thrown into the sea. Newton is the prime suspect having cleaned out his boat and possessing the murder weapon, in addition to which Tosh rang his wife Naomi to say Newton had stabbed him. The one piece of the puzzle that fails to fit is that at the time of the murder Newton was seen drinking in a local bar. Naomi tells Goodman Tosh suspected her of infidelity whilst his son Sam is exposed as vying with his father for the rights of the company and crew-man Addison stole some of the coins. One of these people would appear to have framed Newton. Goodman must establish who and why.