When a Hollywood film crew arrives on Martha's Vineyard with a mechanical shark and a youth film contest boasting a huge cash prize, disgraced pitcher Gayle "Blue Streak" Briar sees a chance to turn a bad season into the best summer ever. After recruiting aspiring cinematographer Elijah Jones and moody director Maddie Grey, Gayle and her crew set out to uncover the truth of the island's own phantom shark and win the prize money. But these unlikely friends are about to discover what happens when you turn your camera toward the bad things lurking below the surface.