It is Earth Week and the school is celebrating. Siggi and Ms. Stratford are presenting different projects that will compete in the Municipal Festival. Charly & Co decide to investigate on their own on poisoned oil. To their surprise, they discover tons of rubbish in soil samples and uncover what looks like an environmental scandal! At same time, Radish has a part-time job helping Ms. Stratford with her laptop ¿ and Fred becomes jealous of him, what causes a big argument between both of them.