What is the main content of the movie Best Friends?

The three girls Xiwen (played by Chen Yihan), Kimmy (played by Fiona Sit) and Xiaomei (played by Yang Zishan) are close best friends with different personalities. Xiwen, who is kind-hearted and a little silly, lives a simple life, and the focus of her life is her fiancé Lin Jie (played by Zhong Hanliang); Kimmy comes from a wealthy family and is a bit willful. She dares to do things when facing men, but is loyal to her friends; Cool Xiaomei (played by Yang Zishan) is the most idealistic and ambitious of the three. Her wish is to become an independent female director.

The three girls have lived together since graduation. They originally lived a peaceful life, but this tranquility was broken one day by Xiwen's fiancé Lin Jie's cheating. The three of them saw Lin Jie showing up in a coffee shop dragging an affair, which made the relationship completely irreparable. The lovelorn Xiwen fell into the abyss of heartbreak and walked like a zombie without eating or drinking all day long. Kimmy and Xiaomei wanted to "save... He returned to Xiwen and came up with the ultimate bitter plan to help Xiwen wake up from the pain of broken love. Xiwen drunkenly meets a good man Qiao Li (Shawn Yue), and they have a mutual affection for each other. However, Xiwen becomes suspicious of the other person's sexual orientation and makes a joke until she learns that Qiao Li and she are both from the end of the world...

In order for Xiaomei to get to know the famous director Ang Lee, Kimmy held a grand party. At the party, Kimmy became interested in the handsome musician Jiutian (played by Wu Jianhao) and kept teasing him, but Jiutian actually saw him. She fell in love with the serious-minded Xiaomei, who stayed out all night, which made Kimmy, who always wanted to be popular, feel uncomfortable. Jiutian asked Xiaomei to go to Europe with her for a concert tour. Xiaomei agreed without thinking. Seeing that the three of them were about to break up, Kimmy walked to Jiutian's boat and used the most drastic method to prove to Xiaomei that Jiutian was not a person worthy of her trust. A man for life...