You've invested your most precious assets: time, money (an abstraction of your time, and energy.
Your return on investment? 0
The reason for the zero return: Your investment partner wasn't actually in the same business you thought you were in.
Normally these factors are the ground for investment malfeaseance civil suits as they should be. When you pour your hard earned assets and quite finite time into a business venture with a partner there is some expectation of "good faith". When they egregiously violate that you sue.
That's exactly what this Russian lawyer is doing to his ex-gf who punched out of the relationship because he didn't agree to legally entitle her to half his shit fast enough.