It's Leo's birthday, and his grandfather gives him an old, faded lighthouse as a present. A real lighthouse. Excited and full of doubts, Leo follows his grandpa to the lighthouse he has taken care of for many years, only that now it no longer serves ships and seafarers. In a night full of emotions, grandfather and grandson will light the lighthouse and send a message of hope, help, and enthusiasm to all those souls who need it. The Lighthouse of Souls is not only a tender tale of the relationship between grandparents and their grandchildren, but also between all of those who look for something they share in common: a light that guides them towards hope.