While attending the Midsomer Regatta with his wife Joyce and daughter Cully, Det. Chief Inspector Barnaby finds himself investigating the murder of Guy Sweetman, the rowing club's chairman who is found floating in the river. Sweetman was quite a ladies man and there is no end of suspects on that score. However, Barnaby and DS Scott also learn that the dead man was having frequent meetings with two other members of the club and may have had an arguments with them the evening he disappeared. As the investigation continues, the police learn that the secret meetings all had to do with money, or the lack of it as all involved were having financial difficulties. Not surprisingly, the motive for the murder is both greed and lust.