tar.

tar
noun

a dark, thick, flammable liquid distilled from wood or coal, consisting of a mixture of hydrocarbons, resins, alcohols, and other compounds.

...

Life after death was no mystery to Roger, a man who was plagued with the sight of a Medium, and yet, he did not truly know what it meant to exist.

While Helena saw the world as clear as the eye could ever see- Roger saw the colors, the changes, it was so easy to get lost in the dark. She was the reflection of the sun and his only shining light, until, the inevitable happens:

Death.

But he knew something. Her death was not natural, it was no accident, and so he will be led by the light of revenge for her soul to rest in clear waters. But if time fails him, they both will be submitted in filthy, murky, tar.