Adrian Kane was once a rising star in football—However, during one match, a malicious tackle from his opponent injured his knee. He gritted his teeth and made a comeback, but only five minutes after returning to the field, he was injured again. From then on, the media and fans labeled him a "glass man." His football dream was shattered, and no one wanted him anymore. But Adrian never gave up training. He began to put himself through extremely harsh training routines.