What is the setting of Copenhagen by Michael Frayn?

Frayn's play takes place in the afterlife, as three characters reminisce about, and try to sort through, particularly interesting details of their lives. By placing these characters in the afterlife, Frayn has the freedom to allow speculation and reflection. The characters are able to come together and focus on their relationships, how they unfolded, what they entailed, and how they affected not only one another and their families but the world at large. In the afterlife, the characters are free to question one another's actions and motives; they can challenge one another's beliefs and memories; and they can look back more objectively, since their human egos no longer exist. The threats that existed during their lifetimes no longer concern them.