▁his ▁sister s ▁and ▁their ▁lack ▁of ▁economic ▁stability . ▁Mar gar ita ▁sets ▁her ▁eyes ▁on ▁Santiago ▁( R ic ardo ▁Á lam o ), ▁a ▁hand some ▁ ▁engineer ▁who ▁works ▁to ▁shut ▁down ▁the ▁medical ▁clin ic ▁where ▁Lisa ▁( S car let ▁Ort iz ) ▁works . ▁Lisa ▁and ▁Santiago ▁fall ▁in ▁love ▁with ▁each ▁other . ▁But ▁the ▁problem ▁facing ▁their ▁relationship ▁is ▁that ▁Santiago ▁is ▁engaged ▁to ▁marry ▁Barbara , ▁daughter ▁of ▁Ern esto ▁who ▁is ▁Santiago ' s ▁b oss . ▁ ▁Cast ▁ ▁St arring ▁▁ ▁Sc ar let ▁Ort iz ▁as ▁Lisa ▁E str ada ▁Mor and i : ▁Medical ▁nur se ▁studying ▁to ▁become ▁a ▁doctor , ▁August o ' s , ▁Sil via ' s ▁and ▁Beat riz ' s ▁sister , ▁Mar gar ita ' s ▁sister - in - law , ▁Jac into ' s ▁daughter , ▁Vic ente ' s ▁god - d augh ter , ▁Santiago ' s ▁lo ver . ▁Mar ries ▁Santiago ▁at ▁the ▁end ▁of ▁the ▁show . ▁ ▁Ric ardo ▁Á lam o ▁as ▁Santiago ▁Or te ga ▁Dí az : ▁Arch itect ▁at ▁Sol ís ▁Const ruction , ▁Barbara ' s ▁f iance e , ▁Mar gar ita ' s ▁one - night ▁stand ▁, ▁Lisa ' s ▁lo ver , ▁E lo iza ' s ▁son . ▁Mar ries ▁Lisa ▁at ▁the ▁end ▁of ▁the ▁show . ▁ ▁Ro x ana ▁Dí az ▁as ▁Mar gar ita ▁Ál vare z ▁de ▁E