The glitchy, colorful 'OBSESSION' title card.

The ad opens with the title 'OBSESSION' in a glitchy, rainbow-colored font against a black background. It then transitions to quick cuts of various scenes: a smiling woman, a smiling man, two people talking in a diner booth, the 'Focus Features' and 'Blumhouse' logos, a box of 'One Wish Willow' matches, a man in a car holding the matches, a woman and man kissing, and a person cleaning a floor. The pacing is fast and cuts between dramatic and intimate moments. The ad ends with the title 'OBSESSION' and release information.