One of the characters drinks a spiked drink, falls asleep, and is raped in his sleep by the other.
No 'chloroform', no 'sleeping', no 'rape'.
'Blackmail' - yes, it only happens in the end, so presence rule rules it out - but 'chloroform', 'sleeping', and 'rape'? Why yes - let's downvote completely valid tags into oblivion.