- Mrs. Lisbon grounds all of the girls after Lux's late return, and Lux responds by meeting men on her roof to have sex.
- Mrs. Lisbon pulls the girls out of school; the only time they leave the house is to go to church on Sundays.
- Lux finds a way, mysteriously, to communicate with random boys and men from all over the city, who come to the house at night and sneak up to the roof with her.
- These guys describe Lux as sexually voracious, but at the same time indifferent to the whole thing. Still, she can't stop.
- One night the ambulance shows up again at the Lisbon house and carries Lux out, in pain.
- It seems she has appendicitis, but actually she's worried that she's pregnant.
- She secretly explains to the doctor that she claimed to have a stomachache so she could get out of the house and have a pregnancy test.
- Lux isn't pregnant, but does have HPV (get your public service announcement here), according to rumors.
- The psychologist, Dr. Hornicker, also stops by to see Lux in the hospital but she won't talk to him.
- He develops a new theory about the Lisbon girls: they're suffering from PTSD because of Cecilia's suicide.
- Mr. Lisbon continues to go to school and teach, but he acts slightly off. Six weeks after his daughters leave school, he quits his job out of the blue.
- It turns out that he was told to resign by the principal, Mr. Woodhouse.
- Now that the entire family is stuck in the house with nothing to do, the house just sort of dies.
- The neighborhood boys notice that Bonnie's wasting away. She dresses strangely and also does stuff like pray at the spot where her little sister had died.
- At night, Therese uses her ham radio to talk to people all over the world, including someone who seems to have also lost a sibling to suicide.
- One of the neighborhood boys' grandmother, Mrs. Karafilis, is an old Greek woman who has suffered great tragedy in her life and therefore seems to have a strange connection with the Lisbon girls.
- In the spring, men from the city come to cut down the tree in the Lisbons' front yard because it's infected with Dutch elm disease.
- The girls protest, linking hands and protecting the tree.
- It works. The men go away, leaving their tree standing for now.
- The newspaper woman, Ms. Perl, shows up in time to write a story about the tree rescue, and links it to Cecilia's death. Typical media move.
- After several months of silence, the girls contact the narrators. The boys begin finding laminated pictures of the Virgin Mary like the one that Cecilia had in her hands in the bathtub at her first suicide attempt.
- They also seem to be sending messages using the lights in their rooms, but it's hard to figure it out.
- The boys notice that there are little candles burning in Cecilia's old room, like the girls have made a shrine to her.
- Finally, a cryptic letter arrives in Chase Buell's mailbox and the boys all believe it's Lux's writing, saying she's over Trip.
- The letters keep coming, asking for help. The girls seem desperate.
- Finally the boys call the Lisbon house on the phone. They let Mr. Lisbon answer and hang up but stay on the line and, sure enough, the girls are there.
- They continue calling one another and have a DJ-off during one conversation, just spending hours taking turns playing songs over the phone.
- After several tracks, which are basically the Now That's What I Call Music of the 1970s, the girls hang up without warning.
- The boys aren't able to contact the girls anymore. They watch them through their binoculars and see the girls packing a trunk. It looks like they're planning to escape from their house.
- They get a letter that says, "Tomorrow. Midnight. Wait for our signal."
- The boys all tell their parents they're spending the night with each other so no one will miss them, and they hide out in a tree house drinking warm beer.
- A flashlight signal in a window at the Lisbon house lets the boys know it's time. They sneak over there.
- They look in the back window and watch Lux smoking a cigarette. They walk in the back door and tell Lux they'll take the girls wherever they want.
- There's a noise downstairs, and Lux says they ought to take Mrs. Lisbon's car because it's bigger.
- Lux seductively unbuckles Chase Buell's belt, but stops before anything happens. She says she's going to wait in the car in the garage while her sisters finish packing.
- The boys decide to go look downstairs for the girls.
- They find the basement just as it was the last time they were there, when they went to the party and Cecilia killed herself. Nothing's been cleaned up and the basement is a total flooded mess.
- Buzz Romano starts dancing in the water, but the rest of the boys suddenly see Bonnie hanging from the ceiling, swinging above his head.
- It turns out that Mary has put her head in the gas oven, Therese has poisoned herself with sleeping pills and gin, and Lux has asphyxiated herself in the garage. Lux was distracting the boys to give her sisters a chance to die before she killed herself, too.