Misae and Hiroshi eat fish eggs that were kept in the fridge. At first, they enjoy the taste but later, they feel sick and experience vomiting and diarrhoea. So, they call up the ambulance. Shin-chan follows Misae and Hiroshi in the ambulance and reaches the hospital. At night, he gets scared, but feels happy after meeting his parents. Next morning, the nurse gifts Misae and Hiroshi fish eggs.