On Deer Isle, Maine, home to one of the world's most productive lobster ports, warming waters and invisible microplastic pollution threaten a centuries-old way of life. As veteran lobsterman, Joel Billings, and his daughter, Hannah, reckon with the possible end of their family's tradition. Neighbor and microplastics researcher, Abby Barrows, offers a vision for a more sustainable future through plastic-free aquaculture.