Half-Life 2: Alyx and Gordon.
The Death Cab For Cutie music was removed by bureaucrats for copyright reasons.
The song can be played here while you watch the video:
• Death Cab For Cutie - I Will Follow You In...
A new motion picture, detailing the turbulent relationship between Alyx Vance and Gordon Freeman. (Contains spoilers)
Song: Death Cab For Cutie: I Will Follow You Into The Dark.