What is "captivi"

Captivi is a Latin play by the early Roman playwright Titus Maccius Plautus. The title has been translated as The Captives or The Prisoners, and the plot concerns slavery and prisoners of war. Although the play contains much broad humor, it is a relatively serious treatment of significant themes compared to most of Plautus’ other comedies. Plautus himself points out the difference in tone between this play and his other works in Captivi’s prologue.