As Cabe's trial looms over Team Scorpion, a simple case goes sideways when they help a father and his daughter whose plane crashes nearby. Also, Paige helps Walter navigate his feelings about Cabe's possible future in prison.

On Christmas Eve, when Walter chooses work over spending quality time with his friends, he falls down the stairs and hits his head. As he lays unconscious, he enters a dream world where Team Scorpion never existed and he meets his guardian angel.