A peace plan allegedly made in Moscow, a week of furious scrambling to dial it back by Ukraine and its European allies and now it's back to the Kremlin for Donald Trump's envoy Steve Witkoff, flanked only by the US president's son-in-law Jared Kushner and an interpreter. Have negotiations in Florida moved the needle back in Kyiv's favor? How hard – or soft – can the bargaining be?

Is Witkoff really Putin's puppet, as suggested last week by French newspaper Libération? Beyond last week's leaks that saw the political novice coaching the Russians on how to handle Trump, can this friend of the US president from his New York real estate days make something of the current White House's "art of the deal" approach to trading war for commercial ventures?

Read morePutin accuses Europeans of sabotaging peace efforts ahead of US talks on Ukraine

With facts on the ground slowly swinging in Moscow's favour, what's Russia's incentive to compromise when it's pounding critical infrastructure nightly and now claims to have taken the key eastern city of Pokrovsk after an 18-month siege? What say allies, what with Putin talking deals with Washington while serving up fresh threats of war against Europe?

Produced by François Picard, Rebecca Gnignati, Juliette Laffont, Ilayda Habip, Charles Wente.