"My 4-year-old daughter pointed at the woman starving on the curb. ""She looks hungry, Daddy."" I was a single dad CEO; I wrote checks, I didn't get involved. But I did. I brought her home. Then the tabloids found us, and the man who put her on the streets reappeared, threatening to expose her. They called her a scam. They didn't know she held the key to the one secret I'd buried with my wife. The sun was low over San Francisco, casting that soft, forgiving glow that makes the city look like a p