Sherlock froze in fear. His heart was beating against his chest and his eyes were as wide as saucers.

"No. You.... don't exist." It hurt Sherlock to speak, but still, he couldn't stop the words from flowing.

"You can't exist. You are a legend. There's no such thing as mermaids or sea dragons." He closed his eyes and sigh. "I'm dead. I'm dead and this is my hell. I am stuck in a cave in hell with... a.. mermaid who is speaking in English to me. I really drowned. "