Gwyneth Paltrow plays London publicist Helen, effortlessly sliding between parallel storylines that show what happens if she does or does not catch a train back to her apartment. Love. Romantic entanglements. Deception. Trust. Friendship. Comedy. All come into focus as the two stories shift back and forth, overlap and surprisingly converge.

Mere seconds before the Earth is to be demolished by an alien construction crew, Arthur Dent is swept off the planet by his friend Ford Prefect, a researcher penning a new edition of “The Hitchhiker’s Guide to the Galaxy.”