Les Miserables by Victor Hugo is a long book, with many important plot points. These events are often intertwined, with one leading to another.
The first event is the appearance of an ex-convict in Bishop Myriel's village. The Bishop lets him stay overnight, because everywhere else turns him away. This man is Jean Valjean, our protagonist. He has just been released from prison after serving nineteen years for stealing a loaf of bread.
Jean steals the Bishop's fine cutlery, but the Bishop decides to forgive Jean if he promises to lead a new, moral life. This is an important event because it is a turning point for Jean's character.
Jean changes his name and eventually becomes a rich factory owner, as well as the mayor of Montreuil-sur-mer. He employs Fantine, a single mother who was abandoned by the child's father. Her daughter Cosette stays with the Thénardiers.
Fantine is fired when her coworkers learn of her illegitimate child, which is important because it leads to Fantine turning to prostitution for money and then her arrest.
Jean promises to raise Cosette after Fantine's death, and he rescues her from the Thénardiers who have been mistreating her.
Marius leaves his grandfather's house to live as a poor law student. He joins the Friends of the ABC, a group of radical students. Later during the battle, we will see the significance of this event.
Marius and Cosette meet at a park and fall in love. Their meeting is significant because it influences their characters to pursue one another.
Marius alerts the police that Thénardier plans to rob Jean and Cosette. He thinks he is helping, but the police inspector is Javert, which prompts Jean to flee before he can be discovered.
Eponine helps Marius find Cosette again, but he is unable to marry her and Cosette disappears again, so he joins the student uprising.
Eponine, in love with Marius, takes a bullet for Marius. She hands him a letter from Cosette as she dies in his arms.
Javert is captured by the rebels but Jean, who has come to save Marius after intercepting the note, sets him free.
Jean carries a wounded Marius and crosses paths with Javert. Javert is conflicted, but ultimately lets Jean go and commits suicide.
Marius recovers and reconciles with his grandfather, who consents to the marriage of Marius and Cosette. However, at the wedding Jean tells Marius about his past.
Marius tries to keep Cosette away from Jean, but when he finds out from Thénardier that Jean was the one who saved his life, he tells Cosette everything and the two go to Jean.
After the reunion and forgiveness, Jean dies in peace.