Cage of Shadows.

After her family is massacred, artisan’s daughter Nan Yanzhi becomes the disciple of Zhuang Wujiao, who trains her to survive in a ruthless world. Determined to uncover the truth and avenge her family, she infiltrates the deadly Lingya Tower, where entrants are forced into brutal combat and none are said to return, only to discover that her own master holds power within the very place she came to destroy.