Sara Spring 3: The cure:

Over a year later, during the month of December, Carl and Abby are getting a bigger house for all the mutants to settle in so they can be far away from danger. It's also virus season and everyone is rushing to get their annual immunity vaccines. When multiple mutants die mysteriously, Sara and the other mutants decide to look into what could be causing this. Sara and her friends also have to protect themselves from spies, an unexpected new enemy, and the mad scientist, Dr. Drefin, who are t...