The Guilt Trip plot
"Get ready for one mother of a road trip"
Andy Brewster (Seth Rogen) is an inventor living in Los Angeles. He comes up with a fantastic organic cleaning agent but finds no one interested in manufacturing the product. Andy plans a business trip to promote his product and decides to take his recently widowed mother (Barbra Streisand) with him. She has been depressed since his father's death, so Andy has the following idea: on the journey he will surprise her with a stopover in San Francisco, where one of her former lovers lives.