Trenchcoat Detective vs Zombies

A drawing. A man in a beige trenchcoat aims a revolver towards the viewer at a three quarter angle. Smoke rises from the nuzzle of the revolver. The man wears a fedora. He is smoking a cigar, and the lit end of the cigar illuminates part of his face. His eyes are open. Behind the man we see a dark harbor with a lighthouse that shines a red light. Blood-covered zombies shamble towards the man. The zombie are hidden in a dense mist, leaving them as shadowy shilouettes. Even further away we see giant tentacles rise from the oceans, also only visible as shilouettes amidst the mist and fog.