It was a random day in Equestraia when a portal opened up in Canterlot, leading to other dimensions. After making peace with the other dimensions, Celestia decides she wants to know more about the biology of the creatures, sending the best doctor in Equestria, Horse MD, to an interdimensional medical conference. In response, the other dimensions send in their "best" doctors and very little medical info is exchanged. Instead, a debate over the validity of pants, inquires of synthetic humor, rants, and overall craziness occurs.

Random crossover between MLP and Scrubs, Mass Effect, Doctor Who, and 30 Rock. Yeah.