Best friends Charlotte and Jane are just two ordinary girls on a school trip to the Scottish Highlands-until they stumble upon a mysterious necklace hidden deep within an ancient castle. When they open it, they're pulled into the past and find themselves aboard the Titanic on its fateful voyage.Armed with only their courage, quick thinking, and the bond between them, the girls must find a boy named Henry before the ship sinks... or risk being lost to history forever.