On this movie she plays the role of Elizabeth, an iconic television aerobics instruction on tv. She use to be a big Hollywood star but yeah that Aerobics tv show is the only one she have left.
On her 50th birthday, Her boss fired her because he thinks she is a grandma now. He wants to replace her with a younger Aerobics instructor.
One day someone offers her a subscription called "The substance" it has instructions. She will inject the starter and it will split her body into 2. Her current body and a Young beautiful one. every 6 days, her consciousness will switch between the 2 bodies. She named her 2nd body Sue.

Every 6 days, she must switch bodies between Sue and Elizabeth. She must not overstay on one body or there will be horrifying circumstances if she dont follow the instructions.






