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From the liner notes

Ricky is a promising young scientist whose experimental formula regenerates dying cells. Ever since his parents died, Ricky's been trying hard to balance work while taking care of his younger brother Jermaine. When Jermaine is killed in a violent drive-by shooting, Ricky does the unthinkable to bring him back to life. His brother is now a blood-thirsty zombie wreaking carnage all over the hood. Now it's up to Ricky's colleague Scott and the boys in the hood to stop Jermaine from killing and turning the entire hood into zombies.