As Meg 2: The Trench unravels, it's up to Jason Statham's Jonas to once more save the day. More giant sharks enter Chinese waters, plus another meg from Jonas' Oceanic Institute -- Haiqi -- surfaces to wreak havoc, treating vacationers like chum. In addition, Meg 2 has a big arc play out earlier, where the heroes have to escape the dark Trench to get back up top.
Source:https://www.cbr.com/meg-2-the-trench-unanswered-questions/