Where can I watch Chain Letter in United States?

Six friends receive a mysterious chain letter via text messaging and in their email accounts from a maniac who's hunting down teenagers who fail to forward his online chain letter. Who knew they should take the threats in the chain letter seriously? Or that chain letters using the teens' favorite technologies to track them can kill? This maniacal game pits friend against friend as they race to beat rules that seem impossible to escape. Break the chain, lose a life. Do you pass it on? Does friendship mean anything?