Ten-year old genius Kira and her specially gifted dachshunds Max and Myla, along with Zylata, the Balinese cat, are advised by Jerry the gibbon at the Hill Country Aquarium about a hidden, mysterious silver box from which the M-Team uncovers an old pirate letter. This discovery alters the M-Team's original mission objective and sets them on a thrilling adventure, embarking on the most extraordinary treasure hunt of the century. As they race against their adversaries, Hill Country Aquarium owner, Charlotte, and her associate, Calvin, Kira is forced to choose between doing what she knows is right or risk losing the treasure to Charlotte and Calvin.