"Down" is a psychological thriller set almost entirely in a confined space: an elevator. The story follows Jennifer, an ambitious office worker, who gets trapped in an elevator late at night with Guy, a seemingly charming and friendly security guard, over a long Valentine's Day weekend.

At first, the situation seems benign and the two bond over their shared predicament, even becoming intimate. However, things take a dark turn when it is revealed that Guy is not who he says he is. He is actually John Deakins, a stalker who planned the whole elevator malfunction to trap Jennifer and get close to her.

As Jennifer realizes the truth, she must fight for her life in the confined, high-stress environment of the elevator. The episode spirals into a tense cat-and-mouse game filled with violence, mind games, and survival.