Black Adder traces the deeply cynical and self-serving lineage of various Edmund Blackadders throughout British history, from the muck of the Middle Ages to the frontline of the First World War.

Since the death of their father, the Riley siblings have kept their heads above water by illegally dealing in painkillers. Josie is managing the business with an iron fist, when her brother, War veteran Kip, is concerned that the risky business is increasingly turning them into outsiders in their small community. While Kip wants to keep his younger brother out of their illegal endeavors, his younger brother is already making plans of his own.

What was a cunning plan from Lord Edmund Blackadder V to fake a time machine on his gullibly incompetent friends, turns out to be the real thing and hurls him and his imbecile underling, Baldrick, through the course of human history.