cliff–hang·er 
/ˈklɪfˌhæŋɚ/ noun
plural cliff–hang·ers /ˈklɪfˌhæŋɚ/ noun [count] : a story, contest, or situation that is very exciting because what is going to happen next is not known
▪ The election was a real cliff-hanger. No one knew who was going to win until the very end.
▪ The election was a real cliff-hanger. No one knew who was going to win until the very end.
