Day 1 - Premise complete. What are your thoughts?

Missy (name to be changed) has gotten into drugs, specifically marijuana. When her parents find out, they send her to a rehab program. Missy vows to make a change, but when she returns to the high school she had been attending, her friends don’t want to see her change. They even go as far to tempt her by handing her a bag of marijuana in the hall. Can and will Missy stand up to them?