"Luther" follows the cases of a troubled yet brilliant English police detective, DCI John Luther (Idris Elba). Separated from his wife, whom he loves passionately, he is torn between an unrelenting approach to solving serial killings and his attempts to rekindle his marriage. Luther is a highly charged emotional man who is not above stretching the law to solve a case or save a life. In episode one, Alice Morgan (Ruth Wilson) proves she is equally brilliant by committing the perfect murder of her parents, which challenges Luther as never before. Alice develops a strange fascination for Luther and their continued exchanges and interplay serve as a backdrop for the rest of the season. Luther's edgy police tactics make him a serious concern to his superiors, who feel that he is a threat to their reputations and that of the Police force. From the opening credits to the end of season one, "Luther" is a fast paced mystery presented with many plot twists and insights into the human psyche.

Hayley Atwell plays Martha in this, her boyfriend Ash ( Domhnall Gleeson ) is a social media ( Social Media ) fans, almost every day in the Twitter, Facebook this kind of website. In Martha 's persuasion, Ash agreed to help and she moved to a remote cabin. Worse, Ash died. At Ash's funeral, Martha's friend Sarah ( Sinead Matthews ) said they can use Ash in his social media leave " life " recreating a "reality", with " artificial intelligence " Ash. Martha first thought of the idea is incredible, but eventually agreed to. After this, Martha soon found herself pregnant. Artificial intelligence Ash to Martha to write a lot of email, a letter of Martha decided to respond to the. This " life after death " of the Ash will react?