SEE ALSO: Han Ji Hye chisels away as a jewelry designer for 'Full Sun' + BTS photos

The BTS photos show the cast drowning out all of the distractions on set to focus on their lines, showing their hard work and dedication. Nothing is hotter than someone with passion and lead stars Yoon Kye Sang and Han Ji Hye caught eyes even when the cameras weren't rolling with their endless practice of the script. 

PD Kim Ji Woo stated, "As much as there were a lot of chase and emotional scenes from the beginning of the drama, the way the actors don't take their hands off the script to channel their characters left an impression. Such actors' passion is the driving force behind the boost in morale on set."

This drama centers around Jung Sae Ro (Yoon Kye Sang), who lost his whole family to a murderer. Although he initially dreamed of studying foreign affairs, with his family's death, he becomes involved in the dealing of jewels. A love story will unfold between him and jewelry designer Han Young Won (Han Ji Hye), who previously lost her fiance.