The trailer for The Descent does not show the backstory and builds suspense by not revealing details. It shows glimpses of the monsters without graphic violence. Edited sound and movement build tension throughout. The poster depicts a distressed character seeking escape from the dark background. Her expression conveys she is searching for a way out of danger. The billboard is similar but clearer. After the 7/7 London bombings, the campaign changed the poster out of respect, as the film and attacks both involved being trapped underground. The website provides information about the film and companies involved.