THEY PAID FOR A HOLIDAY OF A LIFETIME… WITH THEIR LIVES.
A sinister corporation loses control of a house cat infected with a genetically-engineered virus. The death-toll rises during the mutant feline’s rampage, and eventually, it finds its way on board a yacht owned by a criminal king-pin.
Ok but still kitty, can’t say I wouldn’t try to pet.
Also the ‘uninvited’ part is from the standard issue pre-mutation cat behaviour, virus didn’t add that, that’s just how cats work/happen to adopt you.