1. Departure
--Present--
Magic was dying. There were few and fewer magical births every year. Many magical creatures became extinct. There are no unicorns now. No new house elf was born in the past 50 years. Magical levels of witches and wizards have become so low that no one can cast a patronus now. That's condition make Harry Potter the current Master of Death after combining three Hallows in the last war bracing himself and his wife Gabrielle Potter to walk into the veil of death.
--Two hundred years before--
When the dark lord had cast the killing curse on Harry, the soul piece was destroyed. But it had some consequences which he did not realize at that time. It seemed that some of Voldemort's personality leaked into him which changed Harry gradually but not in a bad way. After the war, Harry did not go back to Hogwarts for his NEWTS. He retreated to Grimmauld Palace for some lone time to figure out his future, which was unlike him because usually, he used to charge blindly into any situation. During the time Hogwarts was being rebuilt he started to study some of the books in black library. As soul piece, he was destroyed he was able to concentrate easily. He attended the funeral of Fred where he felt like an outsider among the Weasleys. At the funeral of Remus and Tonks, Andromeda politely informed him that he was not welcome around Teddy. He was sad to hear that but he understood her feelings. He agreed to her demand but he still used to send Teddy gifts on his birthday. While Hermione and Ron used to visit him time to time he knew they were busy with their new relationship as well as their own family issues. As he had a lot of free time in his hands, he used this time to learn magic. First, he brushed up his occlumency and found that he was easily able to shield his mind and his mind also felt very clear. With new found concentration he started studying starting from the seventh-year material. He easily understood them. Two weeks before the new term started he went to Ministry and took his NEWTs and easily passed them. Afterward, Harry starts planning the next course action he should do. Knowing how fickle British Ministry of Magic world to his reputation and fear they start calling him the next Dark Lord, Harry decided to go out of ministry way by traveling the world to learn all knowledge both magic and mundane technology along the way. The next day, Harry go to Gringotts to settle his account. After goblin forgave him for breaking into their vaults by paying the remuneration, Harry withdraws all content in the Potter and Black family vaults. The next destination is Magical Trunk Shop, there Harry buys ten magical trunks to contain all the books from Potter vaults and Black library, potion ingredients, Hallows and other items for his travel. After saying goodbye to everyone, promising to come back soon which he had no intention of, he left magical Britain.
Over the years he traveled across the world learning different magics and meeting different people. He also encountered many dark wizards whom he killed ruthlessly. On his journey through France, he met Gabrielle Delacour that just run from her house to escape the marriage arrangement that set up by her father. Harry and Gabrielle then start exchanging story of their life. Feeling there is chemistry between them during their talk, Gabrielle decides to accompany Harry to travel the world. So that's how Harry and Gabrielle start their relationship and ended in marriage a year later. During their travel, both of them decided to not only learning magic but also mundane knowledge to compliment each other. Because of that both of them mastering many branches of magic, hand to hand combat, sword battle, and still adept in technology. After five years of travel, both of them decided to settle in America. After buying a house in the town near Salem Magic Academy, they start decided to have children. Ten years later, they become a big family by having five children, two boys, and three girls. But their happiness is cut short when they realize they are not aging a bit and still look like a mid-twenty-year-old couple. After investigating the cause, they realize the legend of the master of death by combining the Hallows is real. Fearing prejudice that will haunt them if their nature discovered by another wizard, they start using glamour to match their age. Fifty years later, the couple starts understanding that their immortality only applied to Harry and Gabrielle and not to their descendant. Afterward, Harry and Gabrielle start withdrawing from the family affair and then faking their death a year later by a magical explosion caused by a magic experiment leaving no body trace. So that's how the couple starts their seclusion and resuming their world travel to learn all knowledge humanity to offer the next hundred years.
--Present--
Witnessing their decaying world, Harry and Gabrielle searching for a way to leave this world behind to another world. The couple found a way to leave this world by using a Veil of Death. After preparing all they could for their travel, they use a ritual in front of The Veil in Samhain when the barrier between the living and dead was weakest. They summoned their courage and stepped into it.