introduction of Katherine and Alejandro

a beautiful girl named Katherine king wanted nothing to do with high society life and prestige she disowned her name of royalty to become a doctor only to be thrown back in when one night she saves this handsome young man not knowing his past until something bad happens and alejandro returns the life saving repent he's young and ruthless demanding taking over the large empire his father ran as the boss until alejandro saw him get murdered he has a wounded heart will he let Katherine in or will he break her heart