When in Rome

Manhattanite Ashley is known to many as the luckiest woman around. After a chance encounter with a down-and-out young man, however, she realizes that she's swapped her fortune for his.

Unlucky in love, chemist Paul Matthews visits gypsy Madame Rosa for help. Quickly realizing he is a hopeless nerd, she gifts him with Love Potion No. 8, which makes anyone who wears it irresistible to the opposite sex for four hours. Paul and animal psychologist coworker Diane Farrow decide to test it on themselves. The awkward pair suddenly find themselves alluring to anyone they approach, but soon realize they are most attracted to each other.

For a long time, Natalie, an Australian architect living in New York City, had always believed that what she had seen in rom-coms is all fantasy. But after thwarting a mugger at a subway station only to be knocked out while fleeing, Natalie wakes up and discovers that her life has suddenly become her worst nightmare—a romantic comedy—and she is the leading lady.

Cathy Timberlake is en route to a job interview when a car transporting businessman Philip Shayne covers her in mud. He sends his assistant, Roger, to apologize, but upon meeting Cathy, Roger knows that she would be a suitable match for his boss. Despite their mutual attraction, Cathy and Philip want different things. Philip wants a fling, while Cathy wants a marriage. As they travel to exotic locales, their differing motivations are put to the test.

God has had enough of the bad behavior and attitude of humankind, and has decided to start it all over. It is up to a struggling inventor and a bank teller, both with very amateur criminal minds, to save the world by falling in love.