James and his family go on a short break, camping near the sea during half term week. This is an unforgettable trip for James who makes friends with the unimaginable Yoko, the alien. James gets to know a little about his mischievous friend and enjoys having him around. Yoko reveals to James that he can become invisible at the click of a finger. For James this is excitable. Yoko is mischievous and can-do things which no one would think possible. Yoko plays tricks on people which is fun for James. Yoko makes holiday humorous and enjoyable. He is a friendly alien who differs from the rest of his alien species, which in turn leaves Yoko feeling unwanted and looking for that one special person he can call a friend and have fun with. James' family is puzzled by the strange mysterious activities occurring. Little do they know, they have an unlikely guest with them. As the camping trip draws to a close, James worries that his newfound friendship could be over. Will he see Yoko again?