On the edge of a Florida marsh, a young girl discovers the power of nature

After hours on the highway, Miranda is beginning to doubt that there is anything beautiful in Florida. But when her dad turns onto the bridge to Turtle Island and she sees the ocean for the very first time, she realizes she couldn't have been more wrong.

Miranda has come here with her dad to meet her grandmother, whose cheerful energy conceals failing health. Miranda has been dreading this family vacation, but what she finds on Turtle Island will change her life forever.

Her grandmother is the self-appointed guardian of the local marsh, a swampy wonderland whose very existence is in jeopardy. A passionate photographer, Miranda plans only to document the landscape. But when a mysterious young boy named Adam draws her into the fight for the marsh's future, she learns that saving the environment can be a matter of life or death.