Kip's dad owns an old-fashioned cinema, the Paramount.

Struggling to survive in an age when multiplexes rule the world, the cinema seems doomed.

But then Mr Lazarus arrives, and introduces himself as the new projectionist.

He's very old, and a bit magical, and when he sets up his equipment, suddenly the images seem brighter and sharper, and the audience numbers are better than ever before.

But one day Kip and his friend are watching Terror Island - a scary adventure set on an island full of sabre-toothed tigers and hungry cavemen - when Kip's little sister Rose appears on screen!

Kip quickly puts two and two together, runs up to the projection room and confronts Mr Lazarus, who demonstrates the Lazarus Enigma: a device that can project things, and people, in to the world of the movie itself.

When you're in the film, everything is real. Real bullets, real swords, real monsters. But beware . . . if you don't get out by the time the closing credits roll, you'll be trapped in the film forever!

Can Kip get to Rose before the sabre-toothed tigers? And if he can - how is he going to get back?!