Twice tells the story of Alfie Logan, a man with the magical ability to relive any moment by saying "twice," allowing him to fix mistakes, avoid danger, and pursue love. His power comes with a crucial limitation: if he undoes a love, that person can never love him again, leading to a profound dilemma when he falls for the perfect woman, Gianna, and faces temptation, ultimately learning hard lessons about fate, regret, and the true value of love and acceptance, all revealed through a detective's investigation into his casino winnings.