Oddsfish! by Robert Hugh Benson is a historical novel set during the reign of King Charles II in 17th-century England. The story follows Roger Mallock, a young man sent by Pope Innocent XI to serve as a diplomatic envoy at the English court. Roger becomes entangled in the political and religious tensions of the time, while also navigating personal relationships, including those with his cousin Tom Jermyn and the enigmatic Dorothy. The novel weaves real historical events with fictional characters, exploring themes of loyalty, faith, and intrigue.