Jung Jaehyun, at 29, is in a mid life crisis. He finds himself surrounded by his friends who are settling down – marriage, family and all. Destiny must be telling Jaehyun something when he once again sees Kim Doyoung, his ex-boyfriend from 7 years ago. Jaehyun and Doyoung were a perfect couple and were to tie the knot. It all ended at the altar when Jaehyun had a panic and left Doyoung alone in the aisle.

Now, Doyoung has no recollection of Jaehyun, having acquired amnesia sometime after the wedding fiasco. Jaehyun seizes this perfect opportunity to pursue lovely Doyoung again, and be able to tamper all the mistakes he made in the past.