It wasn't easy for Carrie Powell to bring relief to her younger son, Keenan, who suffers from a rare cell disorder, asthma, as well as allergies. It was all made worse by the dust and living mold in their Arleta, California home. Doctors told Carrie that Keenan wouldn't live to see his first birthday. Determined to not give up hope, Carrie, a florist by trade, turned to her herb garden to help Keenan deal with his diseases. So, the team of Extreme Makeover: Home Edition made a house call. Their mission was to prescribe the right antidote for Keenan by eradicating the black mold in their home and provide a healthy, new environment for the entire family.