Rough and tough guys have come together for a determined reality challenge! Korean baseball wowed the world with their surprising performances at the 2008 Beijing Olympics and the 2009 World Baseball Classic. It united Korea and provided hope to Koreans. "The Invincible" was created to let baseball once again be the channel of hope as we all struggle in this current economic downturn. The only thing that the team members had at the beginning may have been their passion for baseball, but they are renewed with strong determination. The goal of the disorderly group, which doesn't have the most impressive baseball skills, is to become the top amateur baseball team in the country. The members will never give up the challenge despite grueling training and embarrassing defeats. Their tearful endeavor will touch viewers. Cast : Im Chang-jeong, Kim Chang-ryeol, Lee Ha-neul, Oh Ji-ho, Kim Jun, Marco, Han Min-gwan, Mario, Sin Dong-ho etc.