That Is, the Heart Is the Way

Deep in the mountains, an old Taoist picked up a baby and named him Shouzhong. When the boy grew up, he asked his teacher where the immortal was, and he replied, "There once was." So he went down the mountain to search for immortals, experienced underworld marriages, ghost towns, tree spirits, dragon girls... And enlightened in the world of fireworks. Looking back at dusk - it turns out that the immortal is himself.