Lena is a married, chronically infidelitous Berlin-based European writer, devoted only to gratifying her ambitions and hard-driving libido. Nathan is a footloose womanizing American author, unable to produce the big novel for which he's been contracted. When both writers meet in the Alps, they fall into a mad kind of addictive love, chasing each other selfishly, sexually and even digitally across Europe and America, turning their affair into a high-stakes...