Life on Earth can be an adventure, too. You just need to know where to look. Sarah Jane is acting very suspiciously. When Luke, Clyde and Rani investigate, with the help of Mr Smith and K-9, they discover something unexpected — Sarah Jane has got a boyfriend and she's going to marry him! Of course, in Sarah Jane's life, things are not as they seem and some very special wedding guests ensure this is one day she will never forget!