Enough of the adventures!
When the crew of the Queen of the Winds takes a relaxing dip one afternoon in the turquoise waters of Pearl Lagoon and enjoys a few scoops of ice cream on its sunny shores, they are buoyed by the thought that at last they will have a peaceful journey home.

But, alack for them, in the waters of the lagoon, they happen to come across quicksilver hydras, seemingly harmless creatures who are all the more dangerous, and soon the crew must throw its plans to the winds and change course entirely. The quicksilver poison gives Rosie the ability to read minds, but as it spreads through her body, it gradually transforms her into silver.

The only antidote to the poison, they learn, lies on distant Mirror Island. But as the crew nears the spot marked on the map, they see not one island, but two. One looks like the mirror image of the other, but both are equally dangerous. Which one is real? And where is the antidote to be found?

Our determined heroes won’t give up until all secrets have been brought to light, and they even discover what lies in the dark depths of Mirror Island.