Dark Harbor

The middle-aged lawyer David Weinberg has been married for seven years with his very young wife Alexis Chandler Weinberg. They are driving through a lonely road in a rainstorm trying to get the ferry to their private island. However, Alexis sees a fainted drifter on the roadside and they stop their car. Alexis forces David to bring the drifter to the next town; they miss their ferry and need to spend the night in a motel. On the next morning, they go to their house in the island and David proposes to sail with her, but they have an accident in the mist and the boat is stranded near an island. They find the drifter camping on shore and he helps the couple to fix the boat. When they arrive home, they invite the man to stay with them. When David leaves the house to play golf, Alexis and the drifter spend the time together and he tells that he is a poet, but cannot write, and shows his poems written by different people. He asks her to write and sign a weird poem about drowning for him. Then they go to the woods and when the drifter is going to eat a mushroom, she tells him that it is lethal. However she explains that there are mushrooms that are lethal and others that have aphrodisiac effect. However she does not eat the fruiting body and when they return, David wants to take the man to town. However there is a problem with the boat and he needs to return. On the next morning, David has an argument with Alexis and fights with the drifter that flees. However Alexis meets him in the woods and she is seduced by him, eating the aphrodisiac mushroom. What will happen to them?