 Ecstasy, a collection of three short stories, was published in 1996 and became No. 1 in it s first week of publication. The film is based on "The Undefeated", the last novella in Welsh s book, which was previously adapted into a play and performed to sold-out audiences in Canada and Scotland. After seeing the play, Welsh called it the best adaptation of his work, opening the door for Heydon to obtain the rights to produce a film adaptation. Ecstasy is a transformational love story; from the love of Ecstasy to the ecstasy of Love.