A genius female professor from the Department of Physics accidentally gained the ability to "borrow time" by studying the "time ripple" theory. However, when she reunited with her first boyfriend who had left without saying goodbye seven years ago, she discovered that he was actually a key figure in the huge conspiracy behind "time loan". The two must work together to fight against unknown forces and recover the truth and love that had been stolen for seven years in the countdown to repaying the "time debt".
