On their way to Monte Carlo, Monaco, Marilyn and her husband, Neil, meet several other married couples, including Julian and Phoebe, who are traveling with a lost dog they plan to return to its wealthy owner for a large reward. But, when the dog's mistress is murdered, the travelers become the prime suspects, and Inspector Bonnard is determined to track them all down.
John Candy
as Augie Morosco
Jim Belushi
as Neil Schwary
Cybill Shepherd
as Marilyn Schwary
Sean Young
as Phoebe
Richard Lewis
as Julian Peters
Ornella Muti
as Elena Morosco
Giancarlo Giannini
as Inspector Bonnard
George Hamilton
as Alfonso de la Pena
Roberto Sbaratto
as Detective Toussaint
Joss Ackland
as Hercules Popodopoulos
Ann Way
as Housekeeper
Geoffrey Andrews
as Butler
