Ever since Minnow’s Gran went missing a year ago, strange things have been happening: a wild orca keeps following her along the beach, her senses are more powerful, and she might be turning into a fish!

When Minnow and her new friend Celia learn that a new pipeline project in the area could have a devastating impact on the resident orcas, Minnow uses her new powers and new friendships to make waves of change and discovers that even the smallest fish can make a difference.