An exciting adventure in space, time, and magic. A year has passed since Tina and Paul Robinson met the boy Merlin for the first time, and were whisked away on a crazy adventure with him on the Magic Rainbow.

Now the Rainbow has returned, and it's waiting for them out there in the field. Beckoning to them to come on another adventure.

Merlin thinks he has the Rainbow under his control, now that Mab is out of action. But does he really? Does the Rainbow have its own agenda? If so, what is it?

What appears to be a fun and exciting adventure for the three teenagers, turns out to be more dangerous and terrifying than they could ever have imagined. How will they survive?