The story is about a mage who can control time and he plans to do something with time as well. His ability is a rare one so he gathered as many mages who got the same ability from every era as possible to achieve his goal. The female lead is from an ancient era where there are a lot of mages around and she was also part of the royal family. The male lead is from a prestigious family of mages and there are not a lot of mages in his era. The Time Mage meet them at a particular spot in that exact time and taught them in a dimension where it’s only him and the apprentice. He also paired them with a partner (for some reason I forgot why) and the FL and ML were partnered with each other. The time mage only describe the physical appearance and their age to their partener. The apprentice can write letters to each other but the Time Mage has to see it first since he does not want the receiver to know about their partner's personal life or place such as their homeland (or maybe it’s their era). After he checked the letters and deleting some stuff in there as well, he then gave it to the receiver. Because of the limited information that they know about their partner, they don't really recognize each other when the FL and ML first met. Before they met there was some problem and all the time mages were stuck in another dimension from another universe. The mages have no idea what they will be facing so some of them died in the process. Luckily, FL and ML were in the same universe where there are monsters or zombies. The Time Mage got to the meeting time but he does not see the FL anywhere. He asked the other mages in that era and they said that she went missing for a few days. Then that’s when he learned about the apprentice mages‘ problems.