While spending two weeks at the New Jersey shore as mother's helpers, Mary Anne objects when Stacey neglects her babysitting duties after falling in love with Scott the lifeguard.

In the summer of 1916, ten year-old Chet Roscow is captivated by the local news: a Great White shark has been attacking and killing people up and down the Atlantic Coast, not far from Chet's hometown of Springfield, New Jersey. Then one day, swimming with his friends, Chet sees something in the water ...