In "Sea Foam," Pavese stages a fictional dialogue between the ancient Greek poet Sappho and the nymph Britomartis, played in the film by frequent Piñeiro collaborators Gabi Saidón and María Villar.

The ancient Greek poet Sappho and the nymph Britomartis meet beside the sea and have a conversation about love and death. Sappho is said to have thrown herself into the ocean from lovesickness.