The classically-trained bakers tackle their toughest investigation so far in the competition - a savory mystery dessert - in their last bakes before merging with the remaining self-taught bakers.

The remaining teams of classically-trained and self taught bakers continue to battle for a spot in the semifinals. During the safety round, Yolanda and Curtis are left in the dark about the mystery dessert, piecing together the clues alongside the contestants. Then, in the elimination round, the teams must construct their most complicated cake yet, chosen by guest judge Chef Richard Blais.