After a failed attempt at becoming a full-time artist, Vanessa does her best to ration out the remaining oxygen in her apartment for her younger siblings, Josie and Marcus, until she can afford more. While searching for ways to make it as an artist, Ms.Angie, Vanessa's social worker, warns that Josie will be removed from Vanessa's custody if she doesn't provide for her soon. Marcus suggests Vanessa become a fighter at a local underground boxing ring where winners earn air filters. Vanessa rejects his idea, but when Josie's asthma flares up, she puts her pride aside and fights.