High school student Sung Seo Yun feels unwanted by her abusive, dysfunctional family. She longs for the means to escape them all, so she buys lottery tickets. One day she wins the ₩5 billion grand prize, but discovers that minors are ineligible to play or collect the winnings. She turns to an older recent transfer student from a rich family for help.

High school student Sung Seo Yun feels unwanted by her abusive, dysfunctional family. She longs for the means to escape them all, so she buys lottery tickets. One day she wins the ₩5 billion grand prize, but discovers that minors are ineligible to play or collect the winnings. She turns to an older recent transfer student from a rich family for help.