There are four characters in this true story – father, mother, son and a daughter.
When their marriage broke down, the father took away his son with him to another country though he was just three years old at that time.
That incident happened some 27 years ago and the mother has been searching for her son ever since.
One day, the couple’s daughter, who stays with her mother, typed the name of her "lost" brother into Google and came across a link to some Facebook profile that had the same name as her brother.
She sent a message to that Facebook user and, as luck would have it, he was her brother. The family was reunited through Facebook and Google after some 30 years.
BBC has a video of the reunion while The Sun has more details on how the family members traced their lost son.