 Sister Bertrille, Sister Sixto and the kids are on their way to rendezvous with a friend of Carlos  for a day outing at his plantation. However the sisters get lost on their way. After a day picnicking at the spot which they stopped their journey, the gang are ready to head back to the convent. However their station wagon isn t being cooperative. So Sister Bertrille decides that she will fly to a pay telephone and call Carlos to come pick them up. But the stormy weather causes Sister Bertrille to be grounded as her cornette becomes sopping wet and limp. Now that it s getting dark, the Reverend Mother, Sister Jacqueline and Carlos are worried about the gang not making it to the plantation nor yet making it back to the convent. Despite the storm, Carlos decides to take his plane up and look for them. He finds them and radios for help, immediately after which his plane experiences some mechanical problems and he is forced to make an emergency landing. The gang is rescued but now it s Carlos who needs rescuing. Or does he?! Sister Bertrille joins the search for Carlos, and she finds him at lush plantation owned by the beautiful Gina. Carlos was doing just fine with Gina, and wished that Sister Bertrille had never found him.