Christmas Challenge 2019 – Day 12 (Jan 05)

CipherSolution

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PTIrUBQIqTyoUVQebsAomhRtfN4tR2IvmBQHJNgwPXSomElrPXCvqTwwPTwuPEAwqhKwbhClPECrJ29rb2Soq3CuPTIhmTCjPTIvqN9umBQlbh93qhwrUjntJhChq3AwPEKdUYltJYAwPTSebEK1bhClPTA5PTXtKhwjUNUvxVQnJYKjq2nrPXwrPEKdUVQdq3SnfYKeqBntGNIjqTCrUVQ0UNyvbjQLq2CvPEKdJYZtKNyvfNRtfYHtJhCoqhbtbEAwbTIjUNZtUh9jPES1bhmwbsl6PTwrPTecbTRtq2JtbEAcUECafN5sPTXtmhIaJ2wrUVQhq3PtmTewPTwrUhCamTwcqpntmTewPXUobhChqTwwbjQgmYS0PEAwqN92UVQ0fTRtfN5hUNS0UNZtbT9jmTwcqpQcUpQIqTyoUVmuPTAjJNwrWBQ3fTwafBQ3fNyvPTgoqTntfTCjWpQCqsmoqTyoqhbtmT8tqTC0PXCvqTwwPTKoUVntVh9wqBQpJYK0qTCuPTeobjQ3JYltmT8tmTewPT9nUYAemTwrUjQjq29gPTIrUBQaJYAjfNCuPEKdUVQ1qhScqsSafN91bjQIqTyoUVQ0qjQ0fTRtbTIjf2wrUjQsJYAeU2RrPXewPTwuPTScqhUjq250UNZtJsltGNIjqTCrUVntm2ecqVQdUVQufT9cmEHtJN5lPTgoqTyuPEKcPEQjUYUwqsZtmTewPXUobhChqTwwbjQhbh9gPEQ1bsS1fN5sPEKdUN0rPX9rPEKdUVQlbhw2UVQcmYZtq2JtmTewPTSomElvPEmdUN4tKNyvfNRtm2IkUYHtmYFvPXocUNntJ2yefN1uPEKdJYZtmTewPXUobhChqTwwbjQdJNZtUh91qhZtqNIrxVQcmTewbpQoqN11qhRtbTCcbTywPTA1mBQ3UYAwPECrJNAvUVQ0qjQabhCemTRtJVQamYAwWBQeqhZtmTeemBQ0fTC5PTeemhRtb3KcbEQwUBQ0bswoqhbrPX9rPEKdUVQcmYKuf2wjmEHtq2JtCT9gqYlsbjQuUYK0qTCgUN50WBQIqTyoUVQwxEQjUYSuUYHtfTCjPES1bsUomh9jPTm1fNy0WpQQmBQdUYPtfN5ufYS0UN5aUVntVh9wqBQum2CebsHtfTwuPES0q3A5PTIpq3C0PEKdUVQTfYAwUhyoUYHtfYHtmEA1UV4=

Affine cipher applied on the English letters of the Base64
A = 11
B = 5
The plaintext is the entire plot of “The Last of Us” from Wikipedia.

Plaintext :

In September 2013, an outbreak of a mutant Cordyceps fungus ravages the United States, transforming its human hosts into aggressive creatures known as the Infected. In the suburbs of Austin, Texas, Joel (Troy Baker) flees the chaos with his brother Tommy (Jeffrey Pierce) and daughter Sarah (Hana Hayes). As they flee, Sarah is shot by a soldier and dies in Joel’s arms. Twenty years later, civilization has been decimated by the infection. Survivors live in heavily policed quarantine zones, independent settlements, and nomadic groups. Joel works as a smuggler with his partner Tess (Annie Wersching) in the quarantine zone in the North End of Boston, Massachusetts. They hunt down Robert (Robin Atkin Downes), a black-market dealer, to recover a stolen weapons cache. Before Tess kills him, Robert reveals that he traded the cache with the Fireflies, a rebel militia opposing the quarantine zone authorities.

The leader of the Fireflies, Marlene (Merle Dandridge), promises to double their cache in return for smuggling a teenage girl, Ellie (Ashley Johnson), to Fireflies hiding in the Massachusetts State House outside the quarantine zone. Joel, Tess, and Ellie sneak out in the night, but after an encounter with a government patrol, they discover Ellie is infected. Full infection normally occurs in under two days, but Ellie claims she was infected three weeks ago and that her immunity may lead to a cure. The trio make their way to their destination through hordes of the infected, but find that the Fireflies there have been killed. Tess reveals she has been bitten by an infected and, believing in Ellie’s importance, sacrifices herself against pursuing soldiers so Joel and Ellie can escape. Joel decides to find Tommy, a former Firefly, in the hope that he can locate the remaining Fireflies. With the help of Bill (W. Earl Brown), a smuggler and survivalist who owes Joel a favor, they acquire a working vehicle from Bill’s neighborhood. Driving into Pittsburgh, Pennsylvania, Joel and Ellie are ambushed by bandits and their car is wrecked. They ally with two brothers, Henry (Brandon Scott) and Sam (Nadji Jeter). After they escape the city, Sam is bitten by an infected but hides it from the group. As his infection takes hold, Sam attacks Ellie, but Henry shoots him dead and immediately afterwards commits suicide out of grief.

In the fall, Joel and Ellie finally find Tommy in Jackson County, Wyoming, where he has assembled a fortified settlement near a hydroelectric dam with his wife Maria (Ashley Scott). Joel decides to leave Ellie with Tommy, but after she confronts him about Sarah, he decides to let her stay with him. Tommy directs them to a Fireflies enclave at the University of Eastern Colorado. They find the university abandoned, but learn that the Fireflies have moved to a hospital in Salt Lake City, Utah. Afterward, the two are attacked by bandits and Joel is severely wounded while escaping.

During the winter, Ellie and Joel shelter in the mountains. Joel is on the brink of death and relies on Ellie to care for him. Hunting for food, Ellie encounters David (Nolan North) and James (Reuben Langdon), scavengers willing to trade medicine for food; despite initially appearing friendly and cooperative, David turns hostile after revealing the university bandits were part of his group. Ellie manages to lead David’s group away from Joel, but is eventually captured; David intends to recruit her into his cannibal group. Refusing the offer, she escapes after killing James, but David corners her in a burning restaurant. Meanwhile, Joel recovers from his wounds and sets out to find Ellie. He reaches Ellie as she kills David and breaks down crying; Joel comforts her before they flee.

In the spring, Joel and Ellie arrive in Salt Lake City. Ellie is rendered unconscious after almost drowning, before they are captured by a Firefly patrol. In the hospital, Marlene tells Joel that Ellie is being prepared for surgery: in hope of producing a vaccine for the infection, the Fireflies must remove the infected portion of Ellie’s brain, which will kill her. Unwilling to let Ellie die, Joel battles his way to the operating room and carries the unconscious Ellie to the parking garage. He is confronted by Marlene, whom he shoots and kills to prevent the Fireflies from pursuing them. On the drive out of the city, when Ellie wakes up, Joel claims that the Fireflies had found many other immune people but were unable to create a cure, and that they have stopped trying. On the outskirts of Tommy’s settlement, Ellie expresses her survivor guilt. At her insistence, Joel swears his story about the Fireflies is true