Intertwining couples and singles in Los Angeles break-up and make-up based on the pressures and expectations of Valentine's Day.
Mia Thermopolis is now a college graduate and on her way to Genovia to take up her duties as princess. Accompanied by her friend Lilly, Mia continues her 'princess lessons', like riding horses side-saddle and archery. But her already complicated life is turned upside down once again when she learns that she is to take the crown as queen earlier than expected, all while she meets a mysteriously charming young man.
Having already left three grooms at the altar, Maggie Carpenter is branded "the runaway bride" by jaded New York journalist Ike Graham. But, after his facts are called into question, Ike races to Maggie's hometown to save his reputation and report on her upcoming fourth trip down the aisle – during which he's convinced she'll run again. Though he's there on a muckraking mission, Ike can't help but fall for this breathtaking heartbreaker.
While on a business trip in Los Angeles, Edward Lewis, a millionaire entrepreneur who makes a living buying and breaking up companies, picks up a prostitute, Vivian, while asking for directions; after, Edward hires Vivian to stay with him for the weekend to accompany him to a few social events, and the two get closer only to discover there are significant hurdles to overcome as they try to bridge the gap between their very different worlds.