Halloween night Vincent goes above to meet an Irish writer named Brigit O' Donnell. Halloween is the only night that Vincent is safe above. Catherine is at the same party. Eventually they wind up spending the evening together as Catherine shows Vincent her world.

Catherine has a nearly fatal confrontation with an ex-tunnel dweller, named Mitch Denton.

Vincent is captured and held hostages by two scientists who stick him in a cage. Catherine considers a new job in Providence.

Vincent alerts Catherine to possible wrong-doing at a well-known, renowned orphanage. Her investigation leads to the discovery of a child-selling scheme operated by the orphanage's owner and a thief who uses the children to steal for him. Catherine rescues a brother and sister (Eric and Ellie) and takes them to live in the tunnel world.

Attempting to aid an injured child (Eric) in the Maze, a cave-in traps Vincent and Father. Catherine, after facing Elliott Burch, who has agreed to be a witness against an extortionist, senses something is wrong and rushes to the tunnels. When her attempts to contact someone fail, she wanders the tunnels, tripping a trapdoor which sends her tumbling down to Mouse's quarters. He leads her to the others. Mouse can save Vincent and Father, but needs demolition supplies. Catherine goes back to Elliott Burch, who gives them to her, no questions asked. Mouse succeeds; Vincent and Father are freed. Father is much more understanding of Vincent and Catherine's relationship. Catherine tells Vincent she loves him and he watches her as she returns to her world.

Steven Bass, Catherine's ex-fiance resurfaces. He has all ready been in a mental institute and is very strange. Vincent has dreams of disaster connected to Catherine. He warns her but she thinks that he is paranoid or jealous. When trouble does come to her Vincent is right there.

While exploring a section of the tunnels Mouse discovers a treasure ship. Cullen's greed brings strife.

After faking that Catherine hit him young Tony Ramos winds up living with Catherine. She tries to help him by talking to Vincent. Vincent tries to help as well. But it is Tony who winds up trying to reverse unjust banishment of his family before a Gypsy court.

Catherine volunteers on a teen help line. While working she recieves a call from a young girl who is pregnant and living on the street. After meeting her Catherine talks to Vincent about her staying in the tunnels. Vincent talks to father and they agree to meet this woman. She moves into the tunnels as she awaits the birth of her child. The community tries to hide Vincent from her. She hears many stories of him, but because of his appearance they sheild her from him. When she goes to get water one day she runs into Vincent. Quickly he pulls up his hood to sheild his face. She pulls the hood off and begins to talk to him. She is not afraid at all. While they are talking she goes into labor. Vincent carries her to her chamber and alerts Mary and Father. After she has her daughter she sees Vincent more and more. She begins to fall in love with him. Vincent does not want to be cruel to her but he tells her that his heart belongs to Catherine. She runs away and leaves the baby. Vincent goes