Complex sentence: The film centers on Owen Pentecost (Robert Stack) from North Carolina, who comes to Denver on a whim encounter with Ann Merry Alaine (Virginia Mayo) and her posse, who's going there to open a dress shop.
Split into simpler sentences: The film centers on Owen Pentecost (Robert Stack) from North Carolina, who comes to Denver on a whim. He encounters Ann Merry Alaine (Virginia Mayo), who is going there to open a dress shop.