Jang Ji-Goo is a 16-year-old juvenile offender under probation who lives with his only known relative - his grandfather who is sick in bed all the time with severe diabetic complications. To Ji-Goo, home is only a place that stinks with sickness and school, a place to hang out. His only interest in life is his sweet new girlfriend, Kim Sae-Rom. One day, he gets caught after committing burglary with the neighborhood big boys. And without a parent to plead for him, the judge sentences Ji-Goo to the juvenile reformatory while others get lighter penalties.