Klaroline set in Regency era. It's 1809, the beginning of the season in London, the wealthy Pierce sisters, with their companion, Caroline Forbes, arrive from Virginia. Entering the aristocratic world of the ton, they soon meet a particular family, among them, the infamous, troubled playboy Niklaus. AU and Dark, includes most of cast with content rating up to M in later chapters.

Caroline is always the one to distract Klaus, flirt a bit, flash a smile... but is it just strictly business this time, or something more?...