In the hustle and bustle of the city, young people such as Lu Fan and Lin Kexin struggled with career, love and friendship. While struggling for rent and dreams, they faced life's difficulties with jokes and "sadness". A small team of four people in the city, from workplace newcomers, project competitions to entrepreneurial trials and errors, they are funny and build each other's characters all the way, experiencing betrayal, secret love, unemployment, looking back on their hometown, and walking between reality and hope. In the end, through self-growth, mutual influence, and with the calmness and humor after experience, everyone ushered in their own light years. The book is 1 million words in compact progress, the story is warm and hilarious, and hope is not lost amidst the ups and downs.