Set in Incheon, the nearest port from Seoul and a city of migrants, this is a story of five girls who have just turned twenty and who have been best friends since high school. With their graduation, each of them begin to go their own separate ways and render secrets they dont wish to share even with their longtime friends. Hye-joo who dreams of being a successful career woman, is trying to break away from her inferior situation which includes family and friends. Her best friend Ji-young is disappointed with Hye-joos drastic change and become closer to Tae-hee, who has always been the most caring of the girls. She is a dreamer, wishing to lie on a floating boat and watch the stars in the sky. One day she packs a bag to search for a way to find her own world, and asks Ji-young to come along.