When the body of a prehistoric plesiosaur is washed up on on a beach in Wales, Mo and Fernanda go to investigate.
Is it real? And if it is... how did it get there?
Local news reporter, Dexter Melton tells everyone that the plesiosaur on the beach is a fake - he doesn't even think dinosaurs really existed, but he will go to any length to get a good news story. When the reporter overhears Mo and Fernanda talking about the Top Secret time gates it sounds like a story not to be missed, so he decides to follow them to find out what's going on.
Hopefully, Ling, Ronan, and Keira can catch up with them before Dextor Melton finds out that time gates are real and tells the rest of the world. After all, who knows what would happen if time gate technology fell into the wrong hands.