1880: In an intense battle the fearsome pirate, Captain Traiton, captures the great ship, Tormenta. But waiting onboard is an unexpected surprise, which will lead to his downfall.
Today: Stuck in detention, Felix is bored, until she finds a note written by her evil head teacher, Mr Foxsworth, which mentions treasure on Thistlewick Island.
Can Felix and her friends, Caspar and Drift, find the treasure before Mr Foxsworth gets it? What is his connection to Captain Traiton? And what will happen when the past and the present collide?