It was first shown in Plan B. Bonnie thought that the moonstone would be hidden there. Stefan and Elena came, and after he jumped down to look for it, he realized that water was filled with vervain. At this point he almost died, but Bonnie and Caroline came to help. They helped Elena go down the well with a heavy chain. Then she sent Stefan up, but she stayed to search for the moonstone. She found it but snakes attacked her. She quickly escaped and gave Stefan some blood.