It's 1906 and Theodore Roosevelt is the sitting president when a familiar face from his past asks him to call upon his team, the ROUGH RIDERS, to save the world once again. But this time the threat isn't anarchists or aliens-no, it's something from the great beyond, the next world after this one, from Death itself. Something so ancient and evil that the Rough Riders will need to add to their ranks in hope of defeating it. Enter: A young HP Lovecraft! With Lovecraft riding at their side into danger, the Rough Riders face a supernatural threat that could lead to the end of everything!