The Robinson family is on a journey overseas to begin a new life. After a harrowing storm, their tall-masted ship sinks, and they are shipwrecked on a deserted island. Mother and Father and their three children, Fritz, Ernest and Franz, are now forced to truly begin a new life: a struggle for survival. Salvaging what they can, the innovative family constructs a tree house in which to live. They embark on daily scavenging treks to recover what food, weapons, and other supplies have washed ashore the uninhabited island...or is it? Soon, strange things begin to happen: provisions start to disappear and mysterious noises are heard. They are shocked to discover an orphan girl, who gatefully joins them. But when pirates invade, what began as a mere struggle to ensure food and shelter soon becomes a fierce battle for this loving family to protect their very lives.