Sabrina and Maritza unsuccessfully try to convince Cassandra that littering isn't cool. The trash in Greendale is so bad, that these "best friends for life" get their favorite skateboard star, Ricky Speed, to come perform and clean up the pollution. Ricky and Maritza together perform a tricky stunt until a windy gust caused by Cassandra requires a heroic rescue by Ricky (with a little help from Sabrina's magic). Ricky is so impressed with Maritza that he gives her his special skateboard necklace. Disgusted, Cassandra goes to the Netherworld to see the Hey Mogoblin skateboard show with another teen witch, Olivia. Here, throwing trash is really cool. As it turns out, Olivia and Hey Mogoblin have evil plans to conquer the Netherworld! During the show, they use chemicals to turn all the witches and warlocks to stone-including Cassandra! Sabrina's got to do something! Since Maritza is mortal and won't be turned to stone, Sabrina takes her along (Maritza thinks it's a dream) to end the ...