 The documentary opens with an introduction by Tilda Swinton, who gives a backstory about Björk's career and her intention with the "Biophilia" project, stating that the singer conceived the project wanting to redefine music in the 21st Century.Images from the "Moon and "Mutual Core" music videos accompany her speech.After that, some frames focus on the Graduale Nobili who are singing the backing vocals to "Thunderbolt" on a cliff in front of the ocean in Iceland.