The daughter of a small business owner, Sierra was an honor student with dreams of college and a career in journalism. But when a double-dealing artist charmed his way into her mother's life, he gambled away their home and the bottom fell out of Sierra's world, leading to a frightening drug-induced psychotic break. Today, the 19-year-old is a feral junkie, scrapping for a fix on the streets of Northern California. Donna Chavous is Sierra's Interventionist.

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