This story is set in the human world of Fionna and Cake. Marshall Lee and Gary Prince are deeply in love. A year after the scarab invaded the town, both lovers decided to marry and adopt a child, they name Ruth. Saying that they rushed into this would be a hell of an understatement, but their love for each other is unwavering, and due to Simon's reality, their fate is inevitable. Will Gary and Marshall manage to be good parents?