A mother she-cat is caring for her three sick kits; Rock, Starling, and Sark, a very curious little kit. One morning Sark ventures out of his bushy den with his very sick brother, Rock. They both cross a small stream, where a large rock lies, hiding a dangerous little surprise. Sark has to live through much pain and loss, and darkness is slowly creeping its way into him..making him turn to a very different life. What will become of Sark?