"Baby and I" is a comedy about Han Jun Soo (Jang Geun-suk) becoming a student father. Han Jun Soo is a tough 18 year old high school trouble maker. Often involved with gang fights, once with 17 other guys, he always wins every time. Suspended in school due to this, Jun Soo's parents decided to leave town to discipline their rebellious son. Instead of feeling terrible about it, he organized a party at their mansion instead. Shopping for the event, he stumbled upon a surprise - a little toddler sitting in his shopping cart wearing the name tag "Han Wooram" and adores Jun Soo like a father. Still puzzled, he brings the baby home although it is revealed that the child is not his biological son but is a son of one of his friends. Hereafter begins his adventures and misadventures while trying to learn how to be a father for his son.