There is no giving up on these four beautiful actresses. They never met each other yet gathered for one goal: participating in the triathlon, a sport that requires swimming, cycling, and marathon without stopping. They have four months to prepare for a sports event that requires extreme physical strength and strong endurance, but they are new to intense workouts and training. Watch the challenge and passion of the Iron Girls now!

• Kim Dong-hyun
• Seorina
• Keum Sae-rok
• Yeon Woo
• Han Ji-hyeon