Which part of the Japanese drama "Cold and Warm" died? Why did you die?

At the beginning of the fourth book, Jiezi died!

The small cooking house "Gangcang", which was converted from private houses, has finally embarked on the track with the painstaking efforts of everyone. Although the five daughters have their own troubles because of family factors; But I still work hard. In order to show filial piety to the loving mother Jiezi, everyone Qi Xin sent Jiezi to new york together. It should have been a happy festival, but Jiezi died of myocardial infarction in a foreign land. Extremely shocked, unable to accept the blow, he refused to believe the facts. When everyone was discussing who should take back Jiezi's ashes, Mei, who had been unfilial, decided to take the responsibility. It's just that this decision in May didn't get the support of her mother-in-law, and even triggered a conflict. With the sense of divorce, she resolutely flew to new york in May.

Jiezi's unexpected death plunged the Okakura family into sorrow. The problem of the constant chaos of five daughters' homes also makes the future full of uncertainty. ...