unexpectedturn
nounUK /ˌʌnɪkˈspɛktɪd tɜːn/
US /ˌʌnɪkˈspɛktɪd tɝːn/
A sudden change in a story or situation that you did not see coming.
The movie had an unexpected turn when the hero became the villain.
OTHER MEANINGS
2. A sharp change in direction while moving or driving.
The road took an unexpected turn and led us into the woods.
3. A sudden change in someone's health or condition.
His recovery took an unexpected turn for the better.
4. A surprise change in a plan or schedule.
The meeting took an unexpected turn when the boss arrived early.