The whole city has turned Mexican overnight and Amy and Rupert encounter the mysterious Elena, some aggressive students and a cricket playing Texan. What is really going on? Determined to find out Rupert finds himself threatened with violence.

Finding a young boy called Steve wandering the streets, the Wildes take it upon themselves to look after him until the authorities can find his family. However, various other people would dearly love to look after him and are willing to go to great inconvenience to do so.