Elizabeth is extremely collected and organized. Briony is absent-minded and creative. They are different as day and night, but, nevertheless, they become best friends. What unites them is that family is of great value to each. The safety and health of children comes first. However, without knowing it, they radically disagree on one very important issue. Vaccinations - to do or not? What if the decision you make turns out to be a mistake and harms your child? Fearing her friend's condemnation, Briony hides some circumstances from her, hoping... no, being sure that nothing terrible will happen. But it turns out differently, and what seemed like an innocent lie leads to disaster.