The narrator explains that
In the Gunman World, in another dimension, robots are “threatening humanity” and the RPM Rangers are the last hope to fight against evil. Scott, RPM Ranger Red, is dueling Professor Cog, but tricks him and manages to escape. But not before taunting Scott about not being able to chase after into another dimension.
A subway train arrives at a station and out comes a horde of Grinders and Professor Cog. They’ve arrived in the Samurai dimension and he’s looking for Xandred. Continue reading