Well, it could be a story about someone offering help. Maybe it's a simple tale of kindness, like a person seeing another struggling with groceries and asking 'Can I give you a hand?' and then a series of heartwarming events follow.
Sure. A person's first hand job story as a waiter. He started his shift feeling very nervous. He had to remember all the table numbers, the menu items, and how to take orders properly. His first encounter with a difficult customer was quite an experience. The customer was very picky about the food, but he managed to handle it well by being polite and offering solutions.
One example could be in the story of King Arthur. Sir Lancelot can be seen as King Arthur's right - hand man. He was a great knight, extremely loyal, and was always there to fight for Arthur and Camelot. He played a crucial role in many battles and was highly respected among the knights of the Round Table.
In a small town, there is a legend about a 'hand licking demon'. A journalist comes to town to investigate. He starts to notice that some of the locals have a strange habit of licking their hands. As he digs deeper, he finds out that there was an ancient pact made with the demon long ago. Now, the demon is slowly taking over the town, and the hand licking is the first sign of its possession. The journalist has to find a way to stop the demon before everyone in the town is doomed.
Here's another one. A young artist left her portfolio on a park bench by accident. A stranger picked it up. This stranger happened to know someone in the art industry. He was so impressed by the artist's work in the portfolio that he contacted his friend and arranged for the young artist to have an exhibition. Her future in the art world was, in a way, in the hands of this stranger.
Sure. A child who is about to tell their first made - up story to their parents might say 'take my hand my first story'. They are both literally asking for physical contact as a form of reassurance and also inviting their parents to be part of this new creative experience.
Well, 'Doctor Who' has elements of hand - waving science fiction. The TARDIS, which is bigger on the inside than the outside, is a great example. There's no real scientific explanation for how that could be possible in our current understanding of physics, but it's a central and beloved part of the show. And then there's 'The Time Machine' by H.G. Wells. While it was revolutionary in its time, it also has a fair amount of hand - waving when it comes to the actual mechanics of time travel.