Top student Kim So Hyun always lived a perfect life: had good grades, her friends and family supported her in everything, she was rich, pretty; she had everything.

Meanwhile Koo Junhoe was the exact opposite: he had the lowest scores in the whole class, he was the leader of the school gang, his parents didn’t care for him, and he hated everything except for his younger brother Chanwoo.

But what happens when these two cross each other’s paths?