The Chuseok special film 'Eldest Grandson' (directed by Oh Jung-min) will air on KBS1 on September 26 at 12:40 a.m.

■ The Story of a Three-Generation Family Around a Tofu Factory

'Eldest Grandson' depicts the story of a family that runs a tofu factory. Three generations appear, from grandfather to grandson, examining the expectations and conflicts built up within a family living and working together. For the family, the tofu factory is both a workplace that sustains their livelihood and something to be passed down to the next generation.

However, Sung-jin, the eldest grandson of the family, harbors different thoughts. Caught between the role his family expects of him and the life he wants, Sung-jin's choice grows into an issue affecting the entire household.

■ Differences of Opinion Revealed on Ancestral Rite Day, and an Unexpected Parting

On the day the family gathers for an ancestral rite, differences of opinion over the factory's management come to light. The conflict deepens when Sung-jin declares that he will not take over the family business. After subsequently experiencing an unexpected parting, the family members come face to face with each other's positions and long-standing issues.

■ From One Eldest Grandson's Choice to the Circumstances of the Whole Extended Family

The film starts from one eldest grandson's choice and broadens its perspective to the circumstances of various family members. It questions what weight the responsibilities taken for granted simply because they are family carried for each person. As each generation's different experiences and thoughts emerge through everyday conversations and clashes, the film also revisits the meaning of carrying on a family business.

■ Cast and Viewing Points

Kang Seung-ho plays the eldest grandson Sung-jin. The cast also includes Woo Sang-jeon, Son Sook, Cha Mi-kyung, Oh Man-seok, Ahn Min-young, Jung Jae-eun, and Seo Hyun-chul. The viewing points are the image of an extended family created by many actors together and the gradual changes in relationships that emerge within it.