The Sonic Underground meet a mysterious fortune teller who gives Sonia a strange pendant. What is so mysterious is that all the things the fortune teller predicted start to occur. Things get somewhat out of hand and she ends up starting to turn invisible. The only known cure is to find the other piece of the pendant. Sonic and Manic are then in a race against time to save Sonia from being turned invisible permanently.
A good and original storyline, some character develpment but this episode also marks the last appearance of Sleet and Dingo on the series. All in all, though, it was a great episode all things considered.