It's bad to abandon your significant other.
Tom just found out that his girlfriend Edna is pregnant with his baby, and he expects that raising it will cost him a lot of money.
Tom wants to maintain his lifestyle.
Tom decides to ask for a promotion at work and begins investing some of his money, so he can increase his income and help Edna raise the baby.
Tom packs up and moves to another town, leaving Edna to raise the baby on her own.
Edna and Tom grow closer and their relationship improves as they raise their child together without having to make financial sacrifices.
Tom is able to live as he was before and Edna has to shoulder all the costs of raising the child.