Gum Bun's one word makes Ji Woong at a loss. Gum Bun, an old lady who’s lived alone all her life, and Ji Woong, a young college student who's ready to do anything to earn money, now have to live together for "Saving Rent Project with Elderly Living Alone." Living with someone else is not an easy task for anybody, and it becomes even more adventurous when it comes to a 70-year-old lady and young college student boy.