Closeup of the Lecesteria’s flowers’ species. http://angio.bergianska.se/Bilder/asterids/Dipsacales/Caprifoliaceae/Leycesteria/

Maybe something in the Leycesteria genus, possible a cultivar of L. formosa (Himalayan honeysuckle group?). Links to images below. Best wishes! https://www.alamy.com/leycesteria-formosa-himalayan-honeysuckle-deciduous-shrub-image279236667.html

These leaves look smooth and not hairy in texture which is often the case with the nightshade plants.

The bloom almost looks like a cross between a Justicia plant and a hop hornbeam tree. What can you tell us about this plant? A tree? shrub? AN annual? It doesn’t look like any kind of nightshade to me.