You just got a used car, and while cleaning it find an out-of-place button. Upon pressing it, a voice says, “Welcome back, Agent Five.”
They were at first confused at where the real Agent Five has disappearedd to, but upon seeing you ‘know’ of them and have Agent Five’s care they decide Agent Five was sending them you as a replacement, swearing that you are some kind of message from Agent Five you are now roped into all of Agent Five’s work and cases