The play tells the story of a group of urban young men and women in love, affection, friendship knotted tangled in the struggle and redemption story. Zuo Zaijun and Zheng Lei are university friends, the two men have a common eight year old non biological daughter kat. Small lemon is Chun and zhenglei University in the era of love object, is also wonderful wonderful mother, eight years ago, little lemon to study in the United States after heard nothing. Eight years later, little lemon appears again, and Chun has too many not understanding, small lemon moved to action by then Chun, Chun finally agreed to let a little lemon will wonderful wonderful back to Shanghai. Back to Shanghai after zhenglei and small lime walk very near, and Chun cuyi, shortly after also came to Shanghai, two father into rival, launched their offensive, jokes abound. Then Chun encountered the university students Sun Ni, Sun Ni bold pursuit of love, little lemon heart jealousy but dare not face up to the heart. Zhenglei through small lemon heart belongs the initiative to withdraw, and meet the spicy policewoman flower children Dan and outspoken and cheerful children Dan moved zhenglei. Finally the secret of small lemon is slowly opened, and Chun sincere confession moved small lemon, no matter what happens in the future, two people decided to go firmly.