Movie Story : Dr. Emma Collins is spending her third summer on Little Happy, a remote island where she and her team study how climate change is affecting the great white sharks that return there each year to give birth. Living alongside the last two residents of the former fishing village, she enjoys a quiet routine that is shattered when a rival expedition arrives. Led by her ex-boyfriend, marine biologist Richard, the group is hunting three bull sharks, and the island soon learns that these creatures are far from ordinary.