Salt and Silver [ Dean & Sam Winchester ]

Cordelia and Marleigh Sullivan were born between worlds - daughters of a hunter who walked away and a mother who never truly left the sea. Half mermaid. Half siren. Fully trained to kill what hunts in the dark.

When a routine case brings them back into the orbit of the Winchester brothers, old family ties resurface - along with secrets their father was never meant to learn. As monsters rise from the depths and loyalties are tested, the sisters are forced to confront the truth about their heritage, their family, and the mother Cordelia has spent years trying to hate.

Because sometimes the most dangerous creatures aren't the ones you hunt.

Sometimes they're the ones you love.