Hazel is a 17 year old girl who has cancer, uses a portable oxygen machine to breathe. Her mom wanted Hazel to attend a support group of cancer patients. After the meeting a boy named Augustus starts to talk to Hazel to come over to his house and they agreed to read one of their favorite novels
Augustus tells Hazels when she was in the ICU he got a body scan, the results showed the cancer returned and spread. In his final days he had a pre funeral for him.
Augustus tracked down Van Houten's assistant to send him emails about questions of his book. Augustus takes Hazel on a picnic to tell her he is taking her to Amsterdam to meet Van Houten. She realizes she is falling in love with Augustus but doesn't want to hurt him she says she is a grenade that is waiting to explode.
One night Hazel's lungs filled up fluid and she had to rush to the emergency room . Soon she is going to be released and she found out that Augustus never left the waiting room . Augustus gives Hazel another letter from Van Houten, she wanted to go to Amsterdam so bad.
The doctors said Hazel could go to Amsterdam but, she would have to have her mother come with her.They went to meet Van Houten and realize he is just a drunk man that would not answer any of their questions.
Augustus died 8 days later, Hazel saw Van Houten at his funeral and he apologized about ruining their trip in Amsterdam. She found out that Anna was his daughter he wrote in the book. She tells him to write another book with Augustus notes in it.