The journey on the Soul Collector, the mysterious ship commanded by the Shadow Grabber, continues. Simon is determined to find his missing father - but the search is very dangerous! Once again, the young heroes must travel through time and space to stop the Shadow Grabber. In the end, they find themselves in his world underground - in the Shadow World. And here, far more dangers await than just the Shadow Grabber himself. Will the Time Warriors succeed in defeating the Shadow Grabber once and for all?.