A former arm-wrestling champion raised in the U.S. returns to South Korea for a tournament that could return him to glory, but he finds his life complicated by the appearance of the biological family he never knew.

Don Lee
as Mark

Kwon Yul
as Jin-ki

Han Yeri
as Soo-jin

Choi Seung-hoon
as Joon-hyung

Ok Ye-rin
as Joon-hee

Son Sook
as Mark's Mother

John D. Michaels
as Fight Announcer

Carson Allen
as Announcer

Lee Kyu-ho
as Punch

Derek Chouinard
as Club Goer