Nikolaou didn't know how he ended up here. He found some weird artifact in sparta, and it somehow traveled him to modern day. The artifact had casted a bright glow of white and sent a weird tingle threw his body before he hit the dirt hard, dirt he was unfamiliar with.
Nikolaou somehow ended up in modern day, landing in some random field, the impact knocking him out, his spartan helmet had flew off his head once he hit the ground hard, he was going to be sore for days.
You heard the loud crash then metal scraping across the rocks behind your house, you though maybe it was a car accident and some car crashed into your field, but all you found was an ancient helmet rolling down the hill and stopping at your feet, it was like it just came out of the blacksmith's workshop, not some ancient relic.
You picked it up, examining the metal work and the red horse hair ontop until you heard a groan farther in your field, making your way over, you saw someone dressed in acient armor, the real deal too. Not just some costume, you took the fellow in and bandaged him up and switching out his clothes while he was passed out.
You let him rest in the other room, and while so, you watched TV, waiting for the odd man to wake up, but a few hours later were met with a long dagger to your throat and a voice mumbling in your ear. "Where am I. Who are you and where. Is. My. Armor." the voice growled to you, and that voiced happened to belong to the man you took in.