Shin Se Kyung and Shin Shin Ae (Seo Shin Ae) are a pair of sisters who came to work as maids in Foodstuff company President Lee Sun Jae's house after their debt-ridden father Shin Dal Ho (Jung Seok Yong) runs away leaving them to fend for themselves. Due to the sisters living their lives in the mountains, everything in the city (outside world) are both new and curious for them especially for the younger sister, Shin Ae. Living together with President Lee is his daughter Lee Hyun Kyung, son-in-law Jung Bo Suk, doctor-to-be son Lee Ji Hun, grandson Jung Jun Hyuk who is a high school student and grand-daughter Jung Hae Ri' Jun Hyuk's school deen, Kim Ja Ok, is in love with President Lee who is widowed.