The story begins when Sharina's happy life turns upside down with the death of her father, Romeo. Left all alone with nothing and no one to care for them after her mother eloped with another man, Sharina and her younger sister Monica must now live and work under the strict rules of their aunt Elsa and her daughter Ginella.
Life has been unbearable for the two sisters, but Sharina does not give up in despair, and instead strive to get an education through the help of Lily played by Rio Locsin in a special guest role, a kind-hearted teacher who treats Sharina like her own daughter.
Tragedy has struck Sharina's world once again when Lily passed away. Much to her surprise, Lily entrusted her small business including her house to Sharina. So, together with her sister Monica, Sharina decided to move in to Lily's house and start a new life.
One day, Sharina sees Lily's old painting of a man inside her ancestral house. She also gets hold of Lily's diary and learns of her encounter with a man who saved her from an accident. Lily fell in love with this mysterious person and waited to be reunited with him until her last breath.
Completely intrigued with the identity of the good-looking man on the canvas, Sharina could not get the face of the man out of her mind and it repeatedly haunts her dreams every night. Until she meets an accident and Sharina finally comes face to face with the mystifying being in the painting. The man saves her from death and Sharina kisses him before he disappears.
In the divine realm of angels, one strict rule applies to every "sundo": that no angel of death can fall in love with a human being. In such case, Arlan has freely chosen to give up his immortal state when he genuinely kissed Sharina back.
Meanwhile, when Sharina wakes up, she searches for her rescuer and falls in love with him. Unknown to her, the man in the painting and her rescuer is one and the same person.
But by a startling twist of fate, Sharina and her "mystery" man's paths will entwine as she meets Benjie, a playboy and a member of small-time syndicate. The angel Arlan, who has been punished and banished to earth to become a mortal, transfers his soul into Benjie's body and has equally fallen in love with Sharina. Now, Arlan must live a life of a mortal, and redeem himself to go back to heaven.
As Sharina yearns to be united with her mystery man, she will face many struggles after discovering his real identity as a thief and gangster. Now trapped into Benjie's body, Arlan must learn how to feel human emotions and endure the day to day life of a normal human being.
Now that the two fated lovers are reunited, how will Sharina accept the truth about Benjie's violent and shady past as a criminal? How will the fallen angel Arlan cope with his newfound life as Benjie, as he deals with the various temptations and struggles of being a human being?
As the two unlikely lovers enter an earthly relationship, will Arlan succeed in fulfilling his mission of saving his beloved Sharina with his second chance at life, and at love? Will our star-crossed lovers realize their destiny to once and for all be together even in the next lifetime? Will their love story and commitment to be together last till eternity? Is Sharina willing to commit sins for the sake of her loved ones? Will Arlan be willing to go to hell and back to save his beloved Sharina?
