Determined to celebrate Bonnie's birthday, Elena convinces Jeremy that it's what Bonnie would have wanted. After piecing the broken ascendant back together, Elena, Jeremy and Damon attempt to send Bonnie a message, but the situation turns dire when they make an unsettling discovery. Meanwhile, after uncovering Stefan's secret about his great-niece Sarah Salvatore, Enzo enlists a reluctant Matt to help interfere with her life. Elsewhere, Stefan keeps a close eye on Caroline as she unconventionally attempts to cope with everything going on around her. Lastly, realizing it might be time to move on with his life, Jeremy contemplates leaving Mystic Falls for good.

After assigning tasks to each of her friends, Caroline attempts to deal with her current situation as reality begins to set in around her. While spending the day with Caroline, Elena grows concerned when she starts noticing a strange change in her behavior. Meanwhile, Alaric becomes wary when Kai, who has begun experiencing unexpected consequences from the merge, turns to Jo, desperate for her help. Elsewhere, while Bonnie finds herself in an unfamiliar situation, Matt and Tyler contemplate a major life change. And when Damon offers Caroline advice on how to cope with everything going on around her, it forces him to revisit painful memories involving his own mother.