In chapter 10 of Frankenstein, Victor has had a very pleasant excursion to the mountains rudely interrupted by the sudden, unwelcome appearance of his monster. As one can imagine, Victor's not best pleased to see the hideous creature who only recently killed his brother. He subjects his creation to some choice insults, calling him a "wretched devil," an "abhorred monster," and a "vile insect."
The monster expected such a reception. He tries to calm the situation by promising that he will be "mild and docile" if Frankenstein agrees to do right by him. The monster feels like Satan, the fallen angel from Milton's Paradise Lost, deprived of joy for no good reason. Everywhere he looks, the monster sees bliss, and yet everywhere, he is excluded from it. All he wants is for Frankenstein to make him happy, and then he will be virtuous again.
But Victor is unconvinced by what appears to be nothing more than emotional blackmail. He and the monster are now enemies, and there can be no reconciliation between them. But the monster isn't done trying to persuade his creator just yet. All he asks is that Frankenstein listen to his story. If, after hearing it, Frankenstein still wants to destroy the creature, then so be it.
Eventually, Frankenstein agrees to listen to the monster's story. As he tells us, he's motivated by curiosity, compassion, and a sense of duty toward the creature that he himself made. As such, he thinks it only right and proper that he endeavor to make him happy before complaining of his wickedness.