Singer and Strictly Come Dancing star Alesha Dixon investigates the potential fallout of not knowing who your father is. Alesha talks to children and experts as she examines both the emotional and practical implications of not knowing where and who you come from; from the extreme case scenario of potentially sleeping with a half brother or sister that you did not know you had, to the possible backlash of not knowing your medical background. Alesha wants to get the nation thinking and talking about the issue of absent fathers as seen from the child's perspective. Along the way, she also takes on the ambitious task of helping one young person in their hunt to track down their biological father.