What is the main conflict in Rappaccini's Daughter by Nathaniel Hawthorne?

Rappaccini's Daughter is a short story about a young student called Giovanni who falls in love with a girl called Beatrice. Unfortunately, the poison from her father Rappaccini's garden has contaminated her. One touch from Beatrice and Giovanni will die. While his friend Baglioni gives Giovanni the antidote to cure Beatrice to cure her, his motives are from innocent.