The game plot unlocking method is as follows: 1. Players need to obtain experience points and gold coins by completing daily tasks and event tasks to improve their level.

2. Collect a certain number of Gumi fragments, which can be obtained by completing specific tasks or purchasing specific gift packages.

3. When the player reaches a certain level and collects enough Gumi fragments, he can unlock Chef Gumi.

After unlocking, players can use Chef Gumi to prepare more types of food, attract more animal customers, and improve their restaurant level and income.