Alex, a ruthless Wall Street tycoon, fires his hardworking assistant Mia over a trivial error without a second thought.
On a stormy night, his arrogant attitude offends a mysterious elderly woman, who casts a curse: he will randomly and uncontrollably switch between his human self and a small Corgi puppy.
Left unemployed and struggling financially, Mia finds the stray Corgi and notices its eyes bear an uncanny resemblance to her former boss’s. She takes him home, names him Mr. Fluffy, and regularly vents her frustration about her unfair dismissal to him.
Trapped in the dog’s body, Alex is powerless to speak and must endure Mia’s well-meaning care. For the first time, he experiences the daily struggles of ordinary life that he once dismissed. When he unexpectedly reverts to human form, he races to protect his company from his ambitious rival Brad, who is plotting to seize his business empire.
As Alex alternates between his two lives, his initial contempt for Mia softens into respect and quiet affection. He secretly looks out for her in his human form, while growing fond of her genuine kindness as Mr. Fluffy.
What starts as a humiliating punishment evolves into a journey of redemption. Their unusual bond heals their old grudges, blossoming into mutual understanding and true love.
