Darwin Youth is a Sim in the town of Pineview. In the beginning he lives with his mother, Peggy and father, Marlin. He is deeply saddened by his mother's death. However, when Toni Shell moves in and takes the spare bedroom he is excited to have a maternal figure in his life.
His is once again saddened in mid-teenager-hood when Toni moves out and away despite the fact that both she and Darwin's father, Marlin, had feelings for each other. His light is then brightened when he begins dating Valerie Scroll. The two age into adults and continue their relationship with one of Darwin's main wants being to ask Valerie to marry him. Which he does and she accepts. He becomes excited when his father and Toni marry and as a bonus he recieves a new step-brother, Ernest. When it comes time for his and VAlerie's wedding she begins to have second thoughts and tells him she needs space. She later realizes that she has always loved Darwin after kissing Davis Schwann and feeling nothing. The two then marry in the park, with all their friends, and Peggy, watching. Later Val becomes pregnant and gives birth to their daughter, Martine.
For a while he and Valerie have a happy union. She then tells him about her orchard owning dreams. He tells her they can't afford to buy a new house with the land she needs right now. This all happens shortly after Martine becomes a child. The two enage ina series of fights and one night Valerie storms out, she runs into Davis, yet again. Davis usues his usual charm and sweeps Valerie off her feet. The two kiss and go back to his house and woo hoo.
The next day when Valerie returns home she and Darwin, again, fight. He suggests they seperate and cool down for a while. Valerie doesn't want to seperate, she asks for a divorce and they break-up. That same day Valerie Takes Martine and moves-out.
Darwin attends Melissa's grand-opening and after party, alone. While there he runs into Valerie and Martine and the two share another awkward moment. He then announces plans to leave Pineview. But he will send to visit his daughter from time to time. This causes Valerie to re-think her plans. The next day Darwin decides to ask Valerie to re-marry him one last time. However, as he goes to propose, so does Davis... (Cliff-hanger)
When the stories pick up 5 years later, It is revealed that Valerie accepted Darwin's proposal and the two re-married. They quickly resumed their happy lifestyle. They go through a rough patch again when Darwin's step-brother, Ernest moves-in as Olga dumped him, for Clyde, and threw him out. Later when Davis proffeses his love for Valerie and she rejects he engages Darwin in a fight.
Darwin loses the fight but Valerie sees this and comes to her husband's aid. This causes Davis to flee pineview. Darwin is shocked when he sees his daughter, Martine, making out with her boyfriend Jeb. Just as it appears life is good for the Youth's the TV breaks and when Darwin attempts to fix it he receives a shock which kills him.