On his fifth birthday, Pepa's youngest son, Antonio, gets the ability to talk with animals, and the family takes a picture with him but leaves out Mirabel. Mirabel then sings a song wishing she were also special. ("Waiting on a Miracle"). Mirabel suddenly sees the Casita cracking and the candle's flame flickering, but is ignored when the Casita seems fine to the others. After overhearing Alma praying, Mirabel decides to save the miracle's magic. The next day, she talks to her super-strong older sister, Luisa, who admits that she has a hard time dealing with all the work she has to do ("Surface Pressure"). She suggests that Bruno's room may hold clues to the mystery. There, Mirabel finds a cave and gets pieces of a slab of emerald. After Mirabel gets out, Luisa realizes that her gift is weakening. After her family reminds her of the reasons that Bruno is not to be talked about ("We Don't Talk About Bruno"), Mirabel rebuilds the slab and discovers it is an image of Mirabel standing in front of a broken Casita. Mirabel takes this to mean that she will destroy the family.