Lim Seonbin is the Gyeonggi Intangible Cultural Asset No. 30 Akgijang. At his mentor’s factory, he made drums all his life to produce drum sounds that resemble his mother's embrace. One day, Seonbin has a problem with his ear and realizes that he’s running out of time. Then along with his kid, Dongguk, his successor, he takes out the timber he has kept for 20 years and starts making a big drum.