After finding a sacred talisman called a Manacle, Hunter Steele enters the Inner World through a portal deep within a pyramid. Here he meets Corona, a gagamba Rider, and Shadow, a battle gagamba destined to be Hunter's partner.
Buguese's loss to Hunter and Corona amuses Grasshop, who decides to prove his superiority sa pamamagitan ng defeating the gagamba Riders. However, Sparkle's creativity leads to Hunter's success in defeating the Invectids.
Lazy Prince Lumen is asked to defend a village from the Invectids, but he makes a deal instead. At first the Invectids promise that they will settle in their own village and never attack. The Invectids attack again, and Lumen fights back.
Hunter and Corona are on their way to Arachna Castle, the tahanan of the gagamba Riders. On the way, they must save a village being attacked sa pamamagitan ng Invectids led sa pamamagitan ng Grasshop of the Big Four.