She was locked up by her father in a large lamp. Finn was crying over PB ( Princess Bubblegum)because she rejected him for the 100th time because she is an adult and he is just a 13 year old boy. His friend Jake (a yellow dog) decided to find him someone his age and found out about her and told her father that Finn was a prince seeking her hand. After doing some stupid stuff he won her hand (and even made a part of himself look like him because he can shape shift and stretch)and made 'Finn' choke him. The father pleased, allowed his daughter out to only find she is 'evil'. Jake ran and told her he was no longer interested and Flame Princess in anger chased after. Jake returned home, leading her there where she started burning their tree house. When PB's lock of hair caught on fire Finn sprung in to action from crying on the floor where Jake left him earlier and went out to attack her to only find out she is a girl after PB's water fireworks cause it to rain and forced Flame Princess into her human like state. He caught her from falling and held her. She woke up and pushed away. He smiled at her. She yelled " Why don't you like me?" And he smiled and said he does. She blushed but then became angry, slapped him, which left a burn mark on his cheek and told him to stay away as she stormed off. Jake told him to stay away, that she is evil but Finn followed her. Watching how innocent she was, she was not evil, just fire was hard to control and since she was locked away so long, she finally was able to see things, like water. Finn approached, she was angry but got closer. Finn stomped out some of her fire so she screamed in pain and left. He spends the night trying to find a way to stop her angry fire throwing but only his tears could. She realized she was hurting him too, and thought he was a water element cause all he kept doing was crying. He said they could still be together but she was unsure. They hugged and it it hurt him but he held her tight till she pulled away. After this he keeps seeing her, making her a new home and both want to kiss but are afraid. They do end up sharing a kiss that made her into a powerful inferno that blasted them underground. PB, (who is a scientist as well)was trying to warn them this would happen and if she is allowed to keep burning after the kiss her flames would engulf all around, Finn seeing her unconscious form next to him under the earth panic thinking she was dead and kissed her to try and revive her. He in pain from all the burns passed out, and both were yanked up by Jake. Her power under control for now, but still at risk. They share a rock and begin to kiss it and pass to the other.