Watch Online Free on Watchseries. Vanishing: A Love Story is a documentary about award-winning novelist Cai Emmons and her loving, open-hearted journey towards death. In 2021, at the age of 70, Cai was diagnosed with ALS. Taking place in 2022, during the last six-months Cai's life, the film is, first and foremost, a story about the agency of expression -having a voice to create a legacy in the world.