A class trip to a beautiful island is overshadowed by a local myth about a mysterious ship that may have ties to the lost city of Atlantis.

When Emily makes a wish on a magic stone, she gets a glimpse of what the future holds--and it's a disaster! She tries to make things right, but each trip through time takes Emily to a future where things turn out badly for either the humans of Brightport or the merpeople of Shiprock. Plastic pollutes the ocean, garbage overflows the landfills, and the two towns are no longer getting along. Emily realizes she can't save her hometown and the ocean alone,...

"Aaron wishes he were special like his best friends, Emily Windsnap and Shona Silkfin. But nothing exciting ever happens at his castle in the middle of the ocean. That is, until a mysterious ship visits, and all the crew members are strangely interested in Aaron's trident pendant. One even asks to take a closer look at it . . . and later Aaron realizes he never got it back! With Emily and Shona by his side, Aaron swims to the ship to retrieve his...