It takes Ukrainian foreign minister Dmytro Kuleba quite a while to get to the actual plan but he does ultimately in this piece at Foreign Affairs. Here it is:
In the east, Ukraine can gain the upper hand with more advanced heavy weapons, allowing us to gradually stall Moscow’s crumbling invasion in the Donbas. (The Kremlin’s gains in this region may make headlines, but it is important to remember that they are limited and have resulted in extremely high Russian casualties.) The pivotal moment will come when our armed forces use Western-provided multiple launch rocket systems to destroy Russia’s artillery, turning the tide in Ukraine’s favor along the entire frontline. Afterward, our troops will aim to take back pieces of land, forcing Russians to retreat here and there.
On the battlefront in the south, the Armed Forces of Ukraine are already carrying out counterattacks, and we will use advanced weapons to further cut through enemy defenses. We will aim to put the Russians on the edge of needing to abandon Kherson—a city that is key to the strategic stability of Ukraine. If we advance in both the south and the east, we can force Putin to choose between abandoning southern cities, including Kherson and Melitopol, in order to cling onto the Donbas, and abandoning newly occupied territories in Donetsk and Luhansk so he can hold the south.
That’s pretty much it. They think that will bring Putin to the bargaining table. Much of the piece is devoted to encouraging the U. S. and other G7 supporters not to lose heart. The ratio of propaganda to intelligence in the reporting on Ukraine is so enormous I have no way of assessing the likelihood of success of the plan.