Video: Sam Smith - 'I'm Not the Only One'

Everything is not what it seems in the emotionally-charged video for Sam Smith’s “I’m Not the Only One,” the second single off the British sensation’s critically-acclaimed debut In the Lonely Hour.

Directed by Luke Monaghan, the cinematic clip stars Dianna Agron (“Glee”) and Chris Messina (“The Mindy Project”) as an unhappily married couple. While their relationship may seem picture perfect on the outside, in reality it’s falling apart. While her husband is out cheating on her, a heartbroken Agron breaks down in tears and burns a pile of his clothing on the front lawn.

But when he comes home, she puts on a smile and acts like everything is fine.

“You say I’m crazy ’cause you don’t think I know what you’ve done / But when you call me baby, I know I’m not the only one,” sings Smith.

Watch their unrequited love story.