DATELINE: 300 Years after Cangeling invasion of Canterot. Equestria has been taken over by a hivemind, that goes by the name Gravemind (no, not the one from Halo). Equestria is enslaved by Gravemind, to dig out the ground, looking for the ancient artifact known as the Transverse Key. But Graveminds grip on the ponies slowly dissapates over time, resulting in the release of a Pegasus stallion named Overcast. Overcast, or as his friends used to call him, OC, Must escape the Hivemind Defenders, and free the rest of his comrades from Gravemind. But will it be enough? Overcast has a secret love: Rainbow Dash, who he would gladly die to save. But will he?