Woo Jin bumps into Joo Hyuk in her neighborhood and gets the impression that there is something odd about him. Not only that, her mother, who happens to have Alzheimer’s, recognizes him and even calling him her son-in-law! Joo Hyuk gets upset after hearing that his “mother-in-law” has Alzheimer’s—he can’t help himself but worries about Woo Jin taking care of her all by herself. (thetvdb.com)