A mysterious GPS unit changes the navigation game. A life-size puzzle has the teams scrambling to work together and solve a visual riddle. Monika learns more about her mom and what happened when she was adopted. Kacey discovers an important connection on her father's side. The twins meet a relative that shares their life struggles and remembers when they were taken away to foster care. Elizabeth makes a discovery that changes the course of her life forever and launches a quest to find three siblings.