"Névoa do milagre...." According to legend, the "miracle fog" appears only when something miraculous is about to happen.
One such foggy night, in Salema, Portugal, Agua, a lone Portuguese Water Dog, appears on Natalia's doorstep.
Where did he come from? Why was he there? Could he help the little fishing village become prosperous again? Could he help Natalia's Mama get well?
Could one mysterious dog really change their lives forever?