The movie opens in universe #9876 with Apep attacking The Service trying to take Hermes and Chronos's powers which ends in The Mystery sending Hermes back to the main universe while Apep takes the Bulk and threatens to kill him if Chronos doesn't give him the powers because the powers of the gemstones have to be given not taken. Chronos watches as Bulk is crushed under the weight of the darkness but eventually gives in and lets Apep have his powers. After that The Mystery tries stopping him but is thrown to the ground and covered in darkness killing her. We cut to Apis, The Writer, Thor, and Adam heading to meet with Ava and Samantha but are interrupted by three of Apep's greatest warriors. Eventually Thor is taken and is tortured into giving Apep his powers so now Apep has two of the gemstones' powers and needs 4 more to complete the Gatekeeper's heart. Meanwhile we see Cole, Bulk, and Extraordinary boy go back to the main universe where they meet up with Catman's team. The movie goes on with Apep collecting powers and eventually collects all of them except for Hermes and Neptune. Now all Apep needs is either Neptune of Hermes's powers and so they decide to get the Legion back together and everyone else as well. The movie ends with a huge war but Apep get Hermes to the ground and is about to kill him, but Neptune gives him his powers so that he doesn't kill Hermes. After that the Gatekeeper's heart is complete and Apep corrupts it with darkness giving him ultimate power.
