The story traces the life of Jennifer Storms, a classy 15 year old girl who lives a normal-happy life with her family in London. Having amazing parents, fun friends and a perfect life, Jennifer has nothing to worry about. Until one night which changes everything. The night of her last day of school, she receives a strange e-mail from an 'Unknown' sender. She ignores it at first assuming it to be meaningless. But when problems arise in the city as mysterious deaths take place, Jennifer realizes that they are all somehow connected to those mails. The lass soon starts her investigation on this matter along with her best mates and sets off to find the sender. Join the adventure and find out how Jennifer's life turns upside down as she reveals the secret of 'THE SENDER'.