Some of the puzzles...are different from the classic survival horror puzzles, since you interact directly with them using the mouse. It feels different from the puzzles from the older games (in a good way), which relied more on text to pick choices, such as the clock puzzle from REmake: "Which clock hand do you want to rotate?" "Rotate left or right?"
Also, there are puzzles where you have to collect items and place them in the right place. To be specific, there's a place where there are 4 empty slots...to find the objects needed, the player has to explore their surroundings to find them and put them in place.
Straight from the BlackSoul IndieDB page
regarding the nature of the puzzles:
"SURVIVAL OF THE SMARTEST"
Puzzles are another important feature. You need to find one ore more items to be used together in order to activate a device or free a passage (or anything else); in this case you must find all the items you need (this will force you to explore accurately each level) and then use them in the right way. Often you'll only need to use your brain or your senses. For example, you should figure out how to open a safe by reading a document. Some puzzles require a more detailed perspective (for example, to open a safe you must rotate the handles). In this case we use the point-and-click system, something like graphic adventure (camera close to the object and a little hand to perform action).
As for the plot, it is somewhat of a personal story. The game opens with a letter from the protagonist Sean's sister, Ava, who is a journalist. She traveled to a dangerous village in order to expose what is going on. In the letter, Ava told her brother she's going there, and that he can't intervene. I get the impression they had an argument over it and she went ahead regardless of her brother's disapproval. Ava set out to expose what is going on in the village, while Sean is on a journey to find her before she does something too reckless.