"The Black Adder" is a historical comedy set in late Medieval England on the cusp of the Tudor Period, and centres on the eponymous "Black Adder", the pseudonym adopted from this episode onwards by Edmund Plantagenet, Duke of Edinburgh. The premise is that Henry Tudor did not become king in 1485, but instead rewrote history to portray himself as the man who killed Richard III. The show sets out to rectify the situation by telling the "real story" and presents the alternative history of King Richard IV.