It always gets emotional when Sam Smith is singing, but the new video for his single “I’m Not The Only One” pulls at the heartstrings even harder.

The infidelity captured in the song is brought to life by Dianna Agron. The “Glee” star features as a distraught housewife who knows her husband, played by “The Mindy Project” actor Chris Messina, is cheating on her.

Check out the dramatic clip and have a couple of Kleenex handy.