DARK PARANORMAL
Hero - Different dimensional phoenix. He hunts other phoenixes who have escaped from his dimension into Earth our time. Possible name: Shane. Poses as arson expert hired by police department to profile arsonist who is burning apartment buildings. Actual story is that rogue phoenix is hunting humans for food. Phoenixes have to char their food before they can digest it. He starts out as old man, but realizes he isn’t strong enough to continue the hunt and so intentionally burns an abandoned warehouse to renew himself off-schedule. He is saved by heroine, who is an arson investigator that has been working with him as an old man.
Heroine - Current reality (possibly) arson investigator. Tough, smart and dedicated to finding this person who is burning up the city. She really likes the old expert, but he’s way TOO old for her – like her grandfather’s age. But she realizes he has been keeping information from her so she starts to follow him, just when he enters the building and sets it on fire. She wonders if the expert is actually the arsonist. She saves a man inside, not realizing he’s the same one as her expert.
Villain - not fleshed out yet.
Other dimension - humans are part of the food chain, but definitely not on the top rung. Hero finds the humans of our world refreshing, because the humans in his world are little better than apes. They have simple tools, but no art or architecture. Sort of like the humans on Planet of the Apes or Brave New World.
Resolution - they capture the rogue phoenix together, fall in love and the heroine decides that it’s time for the humans of his world to start to fight back against the phoenix. If the phoenix race comes to realize that the humans are sentient and willing to fight back, then maybe they’ll stop treating them as food and they can co-exist.