Throughout Apple Cider Vinegar, journalists are investigating Belle. One of them, a journalist named Justin (Mark Coles Smith), learns about Belle from his partner Lucy (Tilda Cobham-Hervey), who takes solace in Belle's feed while she’s undergoing breast cancer treatment—and even decides to pause it altogether and try alternative remedies.

Apple Cider Vinegar is based on the true story of Belle Gibson (Kaitlyn Dever), who became a popular wellness guru with millions of followers, until it was revealed that the brain cancer story that was the basis of her empire was completely made up.