Perhaps there's a misunderstanding where Harry's friends think he's done something terrible, like being a spy for Voldemort. So they abandon him. Harry then has to prove his innocence and regain their trust by going on a dangerous quest alone that reveals the truth.
One possible storyline could be that Harry discovers his friends have been influenced by dark magic or a powerful spell that makes them shun him. He then has to find a way to break the spell while also dealing with his own feelings of betrayal and isolation.
Chapter 288, "The Old Master Already Knows", is the clearest early answer because it turns Shen Lan's situation into a concrete plot event. The chapter gives readers a real answer by opening on Jiang Li and Zhao Lang were lifted onto stretchers and taken to...
Chapter 348, "Zhu Ling in Dire Straits, Eight Camps Martial Contest, Betting Five Years—East Ridge Has Fallen!", is the clearest early answer because it turns Cold Resistance Level's situation into a concrete plot event. Early on, If you defend or attack the stage successfully, you can earn one.... By the end, This only made Zhu Tong angrier..
Chapter 237, "Top of the Three Lists! Truly Deserved!", is the clearest early answer because it turns Director Sun's situation into a concrete plot event. It opens with It seemed as if, believing the spilled water couldn't be recollected,...
Chapter 31, "Master, I've been having some bad luck lately!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from Before Shen Lan had reached the backyard, she already heard the...
Chapter 194, "Come and Exercise with Little Shang", is the clearest early answer because it turns Sister Li's situation into a concrete plot event. Early on, Director Sun, this isn't another one of your production team's wicked....
Chapter 350, "Pathways to Promote the Peak of Cold Resistance, Moao's 10th Town, Beishuo's Yang Fa, Nightmare, East Ridge's Lu Yun", is the clearest early answer because it turns Wan Qingyu's situation into a concrete plot event. It opens with Xia Hong took a deep breath, looking at the sky already showing a... and closes on Zhu Baixu was about to continue questioning, but Lu Yun spoke first,....
Chapter 135, "Lai Fu is Missing!", is the clearest early answer because it turns Brother Daniu's situation into a concrete plot event. The chapter turns that into something concrete by moving from The sun blazed down mercilessly, but thankfully, the path to the...
Chapter 119, "Wen Jiaojiao is Poisoned!", is the clearest early answer because it turns Xiao Wu's situation into a concrete plot event. It opens with What is Princess Wen talking about? and closes on For some reason, he always felt there was a mysteriously calming....
Chapter 237, "Top of the Three Lists! Truly Deserved!", is the clearest early answer because it turns Sister Li's situation into a concrete plot event. The chapter gives readers a real answer by opening on It seemed as if, believing the spilled water couldn't be recollected,...
Chapter 341, "Moao's Nine Garrisons, the Inspection System and Zhenyu, Li Hu and Hong Yuru (Part 2)", is the clearest early answer because it turns Lu Dong's situation into a concrete plot event. Early on, Lord Wang is not wrong, but not entirely right either.. By the end, Bai Pingshan, being sensible and grateful, did not ask many questions..