No.2 (the rudest and stupidest guy), happens to live with an orphan named Jun Jeh Young (who has the key to find a diamond). The Sencream Gang is looking for this diamond. Meanwhile, Jun Jeh Young starts to have feeling for No.2 (the stupid guy). Seeing her growing LOVE for No.2, Lee Woo Yeun (another guy) starts to gain feelings for Jeh Young. At the same time No.2 wonders if what he feels for Jeh Young is LOVE--or just another feeling.