Do you remember that vague expression that suitors babble to the ladies? "I'd do anything for you; even to reach out to the stars and give one to you--just give your heart to me in return." Yeah, that?
Imagine a time when space travel is already possible and there's actual space traffic. But it's still a frontier; lots of things are still going to be discovered. You know, it's like when man discovered the wheel and then we had advancements for it, from the simple carts to the race cars of today. It's in that time of advancement that this tale is pitted into. So, a man falls in love with a woman; but she's a bit of a "pain-in-the-ass" but he loves her, y' know. He tells her THAT expression and the egotistic woman became too literal and ordered the poor guy to catch a star and bring it to her!
And so begins a man's adventure into space, and his efforts in "catching" a star and giving it to the woman he loves. The bulk of this story is about discovering a way to tame and contain a ball of flaming gas (in the story, he tries to clamp a fairly small star called The White Crest with a metallic prong device that protrudes from his spaceship, only to see it slipping away in a gaseous spread.)
The White Crest is very important in the story because it's small enough and not too bright, and such a star is convenient to capture. He tries different techniques to other stars, while reserving the Crest for when he finally discovers the right way of catching a star.
Along the way, hindrances find him and he has to evade, fight or overcome all of them; that'll keep the story interesting (maybe a pirate crew that happens to pass by the man's exact coordinates, or a star-eating space worm; the list of bad things goes on).
It's a story about how love will have no limit to a person; how one will do anything for their loved ones.