March 12, 2020. COVID-19 has just been declared a global pandemic, confinement measures are being implemented all across the world. Fanny, Samuel, Marianne and Daniel, four Montrealers from very different backgrounds, must now adapt to this new reality. What they believe to be a temporary situation will turn into a long ordeal that will change their lives forever. Between reality and fiction, Première vague is a portrait of the first 100 days of the pandemic in the city of Montreal, Canada.

It's wintertime and the sun isn't coming out, so Elisa is depressed. Her friend, Vincent, does not hear it that way. He thinks she just needs to get out of her darkened apartment. Determined to prove he's right, Vincent kidnaps an elderly psychiatrist and forces her to give Elisa a "therapy session".