How Did This Happen?

two years after the El Dorado adventure, Nathan Drake is betrayed by friend, Harry Flynn and sent off to Prison, after his release by the help of Victor Sullivan, Ella Davis, and Chloe Frazer, they learn that Harry is working for a madman by the name of, Zoran Lazarevic, who is looking for both Shambhala and the Chintamani Stone, Nate, Ella, Chloe, and Elena must race the madman and find the entrance before he does