When Robbie is arrested for breaking into a restricted satellite facility while tracking unexplained thermal anomalies in the Pacific, he avoids serious consequences after being recognized by Tori's father. Robbie is dismissed with a warning, his theories still mocked and his obsession unresolved. That obsession traces back generations. Robbie has spent his life chasing the legacy of his great-great-grandfather, Ephraim Lionel Shapiro, a disgraced explorer who vanished over a century ago while searching for a place most believed was fictional: the Mysterious Island of Jules Verne. Armed with Ephraim's coded journal, fragmented maps, and impossible seismic data, Robbie is determined to prove his ancestor wasn't mad-and that the island is real. During a school trip to Hawaii, Robbie convinces Tori and her friends to help him check the coordinates hidden in the journal. Before they can rejoin their class, a violent, unnatural storm strikes. Robbie and his friends are separated, dragged by distorted currents, and cast ashore on an uncharted island that should not exist. The island is a hostile, living ecosystem of jungles, ancient ruins, and creatures evolved in total isolation. As the group searches for safety, they discover evidence of others who came before and never escaped. Among the ruins lies the truth about Ephraim's fate: he didn't vanish. He chose to stay, knowing the island resurfaces only briefly before sinking beneath the sea. As seismic instability worsens and the island begins to descend once more, Robbie faces the same choice his ancestor did: prove the island's existence to the world, or save the people beside him, escaping with only fragments of proof and a truth few will ever believe. Go where no Hollywood Arts student has gone before, and discover the most epic adventure of Tori's life!

When Sikowitz suddenly inherits an old castle in the hills of Transylvania, he drags Tori and her friends along during autumn break, calling it a "cultural experience." The place is creaky, drafty, and entirely too proud of its own secrets, and the gang feels that right away. While poking around the castle, Tori and Co stumble into a hidden room where she accidentally steps into a broken vial of unknown substance. Before long, she's dealing with sharp senses, weird cravings, and a confidence boost that makes everyone do a double-take. The others-Andre, Beck, Jade, Cat, and Robbie-scramble to piece together what's happening to her, tripping over dusty legends, feuding locals, and whatever bizarre guidance Sikowitz thinks qualifies as wisdom. As the crew digs deeper, they discover that according to legend, a family of nobles once guarded the castle, and someone out there wants to seize the place for their own shady plans. With Tori's transformations growing stronger and danger creeping in, the group has to work together to protect their teacher's inheritance and keep their friend from losing herself completely. But they're left wondering if Tori's transformations are truly supernatural... or if the isolation, the folklore, and Sikowitz's brand of Coconut juice have gotten under their skin. Either way, they've got to stick together and see it through-even if they're not entirely sure what's real and what isn't.