Spain, 1974. A teenager and his father are traveling in a car that is the only property they have. Their life is a continuous move by desolate coastal apartments in the tourism low season. When forced to change route and get away from sea, their lives will change dramatically.

Three months after her marine scientist husband Rory went missing, artist Mara is distraught to discover that the search for his body has been called off. Alone in their remote coastal home, she is steeped in memories of Rory. But the old house is leaking and Rory's ghost is everywhere. Mara is determined to uncover what happened to Rory, not realizing that she faces a danger that is extremely close to home.

Filmed at Masonboro Island, an undeveloped barrier island in southeastern North Carolina, “Tides” contemplates the liminal space between the modern technological world and that more ecological dimension we label as “nature” or “the environment.”