The trio is captured by Snatchers from "summary" of Harry Potter and the Deathly Hallows by J. K. Rowling
Harry, Ron, and Hermione were on the run, moving from place to place in search of Horcruxes. They were trying to destroy these dark objects that contained pieces of Voldemort's soul. The trio knew that they were being hunted by Death Eaters and Snatchers, who were looking to capture Muggle-borns and blood traitors.
One night, as they were camping in a forest, the trio was ambushed by a group of Snatchers. The Snatchers were a brutal gang who worked for the Death Eaters, capturing and turning over Muggle-borns and other enemies of Voldemort. The trio tried to escape, but they were outnumbered and overpowered by the Snatchers.
The Snatchers took Harry, Ron, and Hermione to Malfoy Manor, the home of the wealthy and influential Malfoy family. The trio was brought before Bellatrix Lestrange, one of Voldemort's most loyal followers. Bellatrix was cruel and sadistic, enjoying the suffering of others. She interrogated the trio, trying to find out why they were on the run and what they knew about Voldemort's plans.
During their time at Malfoy Manor, the trio witnessed the cruelty and brutality of the Death Eaters firsthand. They saw torture and suffering, and they realized the full extent of the evil that Voldemort had unleashed upon the wizarding world. Despite the danger and the fear, Harry, Ron, and Hermione remained determined to fight against Voldemort and to destroy the Horcruxes.
The trio's capture by the Snatchers marked a turning point in their journey. It was a moment of darkness and despair, but it also strengthened their resolve and their bond as friends. As they faced their captors and witnessed the horrors of Voldemort's regime, Harry, Ron, and Hermione knew that they had to keep fighting, no matter the cost. They were determined to defeat Voldemort and to bring peace back to the wizarding world.