Humanity is experiencing the largest migration in its history, as three billion individuals from the future have journeyed back to the present to avoid an impending global catastrophe. These refugees are bound by two strict rules: they must not reveal any details about the future, nor can they contact their families. The sudden influx of these time travelers catches everyone off guard, including the Cruz family. The series focuses on their narrative, following Samuel, Emma, and young Ani. Their lives are upended by the arrival of a mysterious refugee named Alex, who carries a remarkable mission that will transform their lives. To fulfill his mission, Alex is willing to go to any lengths, even if it means breaking the established rules.