Poseidon’s Gold is somewhat focussed around relationships within the Falco family. It also reveals Falco’s determination to make an honest woman of Helena Justina and bring no dishonour to her family, by marrying out of station-in-life. Due illegal trading by Festus and probing by centurions of his Legion, Falco is charged by his mother to protect the good name of his family; he also takes up the task of protecting his Father’s good name as an auctioneer against the overweening possessiveness of the art collectors, who seek to ruin him, and that, feloniously.