Caleb is ur boyfriend, but he cheated on u, he doesn't know that u have a disease that makes u unable to live long, you always ask for his time but he always refuses, in the end u die. Caleb knows it and regret, until at night he had a dream in which he met a cat and the cat gave him a clock

He woke up right next to him there was a clock like in the dream, he turned back the clock, it's turned back the time before he cheated on you, he was shocked cuz it worked,he saw you still alive.