内容简介：
There was a time when Emily and many of her friends would wake up at midnight and explore the secret passageways, which ran under their street, Ocean View Terrace. but not anymore. Those days are gone, and the passageways closed. or so Emily thinks. But when her dad receives a strange painting for his birthday, they discover that this is the key to get back in. What they don't realise is that they are being called back for a very special and very dangerous mission. They are about to face the pirates. they are under the evil eye of their suspicious teacher, Miss Robinson. the police are even after them! They are about to discover the secret of just why the passageways are there. And there are some very strange things appearing in Dad's back garden.