In the 1 st series we have a female warrior/master who pretends to be a maidservant. Her pupil is besotted and through great effort gains sufficient skills to be praised by her and along the way falls in love.
In this 2nd season our two lovers (due to plot contrivance) do not recognise each other for the majority of the 10 sessions. ML is now a bad ass with unlimited power and FL is a weakened female locked away by her self-serving mother.

Characters from 1st series abound and there is a thread of humour peppered throughout that was not part of the 1st series. Special mention of the black turtle and Park Jin's cooking. Lots of CGI special effects and a great many characters all acting in their own best interests to the extent that from a Wuxia drama it became a melodrama.

What also stood out for me was how the modern element crept in. From short hair to some language idioms, and the Fl was was definitely channeling a modern woman at times.

I found this entertaining and if I ever rewatch the 1st series I will probably rewatch this as well.
Actors all did a great job and production was very elaborate but I feel the Hong sisters needed to keep the themes and flavour of their brilliant 1st series.