Minutes after she was born, Sharon Temple-Sowerby was given to a couple who were desperate for a child. However, her birth mother refused to sign the necessary legal papers, meaning she was not officially adopted by her new parents. Over time, the truth was gradually revealed, but all communication was severed when Sharon moved to Germany. In one of their most complex cases yet, Davina McCall and Nicky Campbell try to reunite the 50-year-old with her biological mum and uncover an extraordinary connection between Sharon's quest and a man on his own search for answers.