Say It Isn't So

“They share a love. They share a passion. And they might share DNA.”

Gilbert Noble (Chris Klein) falls hard for Josephine Wingfield (Heather Graham), then learns the two of them may be brother and sister, which is a problem for a couple already deep in love. When he finds out the truth has been mixed up, he drives across the country to stop her wedding to another man, while everyone around him still assumes he wants taboo thrills. J.B. Rogers builds the chase on one plain idea: love keeps going after the facts say it should quit.