Preface

Is May of 1942. The Crystal Gems continue their efforts to retrieve all the Corrupted Gems in the hands of Hydra. But, in their crusade, they will found a great ally that will help them in their way to liberate their friends: the Captain America.
(Red Skull image by MikeMahle: https://mikemahle.deviantart.com/art/The-Red-Skull-poster-244850618)