Firefighter Paakistan

A young teenager, Tyler, is struggling hard in his life. 1 year ago, his mom died in a apartment fire, right between his arms. 1 year later, he can barely afford rent and will be homeless soon. He has a small company, but that isn't working out. He rewatched the scene in his head, how the paramedics just walked away from my mom on the stretcher. He doesn't want that to happen to anyone. So, what does this mean? "I'm gonna be a firefighter".