When John Russo pre-ordered meals for him and his daughter at a local Panera Bread, in Natick Mass.,  he left specific instructions, including an allergy alert, in the messages section of his online order.

His 6-year-old daughter, Elissa, has a deadly allergy to peanuts, so John made sure that there restaurant knew about it in advance of picking up the order.

Just to be on the safe side, he ordered her a grilled cheese sandwich. But, within moments of biting into the sandwich, his little girl mentioned that it tasted funny, then, she began gasping for breath.

Before he rushed to his daughter's side, John pried open the sandwich and was shocked by what he saw. There, in the center, was a huge dollop of peanut butter.

The young girl was air-lifted to the hospital and treated with a life-saving shot of epinepherine. Thankfully Elissa survived, but this could have been avoided if the employee had followed John's instructions and understood the allergy alert.

The store owner allegedly apologized and said that the mistake was due to a language barrier. The employee making the sandwich misunderstood the allergy warning.

The family is suing Panera Bread for engaging "unfair and deceptive business practices by adding peanut butter to the plaintiff's grilled cheese sandwich knowing that [she] has a life-threatening peanut allergy," according to the Globe.

See the clip below - do you think they're right to sue?