Treasure and Vengeance Trilogy follows the exploits of Adam Penfeather and Martin Conisby on their pirate adventures as they seek for what is on their heart, that being the buried treasure or vengeance on their enemies. "Adam Penfeather, Buccaneer" follows the early exploits of Adam Penfeather and his friend Antonia who disguises herself to a boy and follows Adam on his pirate adventures. Adam learns of a treasure of infamous pirate Black Bartlemy, buried on a certain desert island in the Caribbean and devotes himself to finding it. "Black Bartlemy's Treasure" – For five years Martin Conisby has been a galley slave on a Spanish ship, but during a sea fight he manages to escape and make his way back to England. Martin arrives home just in time to save a beautiful girl from the hands of robbers. It turns out that the girls is Lady Joan, daughter of Sir Richard Brandon, a man whom Martin blames for his father's death and for his own ill-treatment, and the man Martin seeks vengeance on. Martin encounters Adam Penfeather, a buccaneer in search for a treasure of infamous pirate Black Bartlemy. Martin joins his group, going on a treasure hunt, delaying his vengeance for some time. "Martin Conisby's Vengeance" – Martin is stranded on a desert island in Caribbean trying to build a ship in order to escape. His plan doesn't work out, but he gets rescued by a group of pirates led by pirate captain Joanna, who falls in love with him. Martin leaves the island with them, but doesn't want to join their crew because he is still obsessed with the desire for vengeance. Their ship coincidentally engages with an English ship which carries Adam Penfeather and Joan and he learns that Richard Brandon is captured by Spanish Inquisition. Martin leaves everything behind and goes for him.