"A new member joins the Shane Gang—Junjie, a master of the ancient slug-fu art! But their celebration is cut short when an evil force begins to corrupt the Elemental Slugs, the ancient ancestors of all slugs in existence. As the Elementals turn evil, all slugs in Slugterra start to become ghouls, leading to chaos. Eli Shane, Junjie, and the gang must race against time to find and heal all five legendary Elemental Slugs before the entire underground world collapses into darkness."
