After sinking, Carlos turns up at the coast along with his colleagues. In a struggle for life already lost, Carlos tries to seek salvation by accepting death leaving his family behind.
When faced with his brother's terrible fate, João finds a way to escape and cut ties with the cult to which his family belongs. Although haunted by the secret he carries with him and the crisis of faith he faces, João has only one goal: to save his brother and to hide from him the cold reality of the world in which they live.
On a Summer breeze, two children wait for the evening to come in a deserted beach where at night the sea is illuminated by “firefly fish”. The entire placidity and innocence of Mateus and Matilde will be transformed when upon the approach of a mysterious figure.
