Ícaro is the story of César, a terminally ill cancer patient who one day receives a text message full of poetry and affection from someone who does not identify themselves. It is the first of a series of messages that will keep him company throughout the month of August. The messages give him an energy he thought he had lost and restore his appetite for life, or at least for reliving his past, while he tries to discover who is sending them. Guided by these messages and by the testimony of the people who were close to him at the time, the documentary shows the different stages of an end-of-life process and the care provided by the palliative care team who looked after him.