Enjoyable classic

Rating: 8/10 (8 April 2020)

This is indeed reminiscent of Agatha Christie mysteries. Not super high energy or dark. Some light drama. Some light humor. Plausible if unlikely intrigue.
One thing though: 100mg morphine would take 10 seconds to start affecting ... pretty much any user. Likely the actual OD would take that long or less. There wouldn't be several minutes of coherent conversation.