Elena and Stefan go to the town's annual Founders' Party, hosted by Tyler's parents. Vicki wants Tyler to take her to the party. Damon tells Elena about the history of the Salvatores after Stefan tries to cut Damon out of his life. Damon also retrieves an amber crystal from one of the historical artifacts in the Lockwood Estate. Meanwhile, Stefan uses Caroline as a vessel to poison Damon. When Damon sucks Caroline's blood, he falls ill.