Johnathan is a nine-year-old boy who loves sea monsters, and his 300 lb. pet pig, named Wee Wee. Unlike most kids, Johnathan has nystagmus, which makes his eyes "flutter." He also suffers from severe narrow angle glaucoma; an acute condition that if untreated can lead to permanent blindness. JoLynn cares for Johnathan alone while her singer/songwriter husband David travels in search of his big break. To treat Johnathan, she grows hydroponic marijuana to relieve the painful intraocular pressure Glaucoma causes. She cooks the marijuana into brownies and feeds them to him in secret. David"s parents, Mark and Linda, live nearby and provide for JoLynn and Johnathan as best they can on a fixed income. Linda is highly critical of JoLynn"s ability to raise Johnathan. During her son"s absence, Johnathan has become more undisciplined than Linda would like. While Mark tries to keep the peace, he is torn between his wife and their daughter-in-law, who he loves deeply.

　　出身医生世家而且风流倜傥但吊儿郎当的吴昌敏（崔振赫 饰）曾有过一段辉煌的历史，却也曾因一段失败的婚姻而走过不小的弯路。而立之年，他和好友林容奎（尹仲勋 饰）一同步入WSUH优秀医院，以实习生的身份开始了新的旅程。实习第一天，他和容奎、妻管严的朴相赫（林贤成 饰）、相赫的老婆李英姬（千敏熙 饰）、美艳动人的韩亚凛（clara 饰）一同分在了急诊室组长国天秀（李必模 饰）的麾下，更令昌敏想不到的是，他的前妻吴珍熙（宋智孝 饰）前一天醉酒被送入急诊室，而且竟然以实习医生的身份和他分在了同一组。
　　旧缘未断，新的人生旅程又已展开，这几名对未来充满设想的白衣男女，彼此间将发生怎样的故事呢？