When Grimian – a powerful Ape Vandal – snags the battlekey in a battlezone, he challenges Kalus for leadership. Kalus is forced to defend his "crown" (the Talon of Vandal) in the ritual of Kio hakoko – a series of difficult challenges.

Thanks to a tip from Zemerik, the BF5 head to a Red Sark Moon in the hopes of linking up with a mysterious resistance movement that is giving Krytus and his Red Sark army some difficulty.

When Sage has a disturbing nightmare about a mysterious artifact known as the Double-Helix Crystals, she orders the BF5 to find them before The Crimson One can get his hands on them. If he does, he'll be able to release the frozen Red Sentient civilization, destroy Sage, and achieve his goal of ruling the multiverse.