Watch Iron Swallow for Free: How to Stream the Movie Online at 123Movies. . When the deadly Iron Swallow (Chia Ling) sets out to avenge her past in this classic martial arts film, audiences are about to find out that it is revenge, not time, that truly heals all wounds. As the Iron Swallow sets out to enforce her own deadly brand of justice, a mysterious killer (Wong Wing San) charts her every move in a desperate attempt to frame her and prevent her from realizing her bloody dream. Now, as the limbs fly and the blood flows, friend will fight friend in an all-out battle to the death where the only rule is survival.