How about a crossover with a supernatural show? A member of 'Hawaii Five O' could encounter a supernatural being and have to enlist the help of the characters from that show to solve a mystery. This could bring in elements of magic and the unknown, which would be a new and different take on the usual crime - solving in 'Hawaii Five O'.
A time - travel crossover fanfiction could be really exciting. Maybe a character from 'Hawaii Five O' travels back in time and has to work with a past version of the team to prevent a major event that would change the future of Hawaii. This would involve a lot of research into the history of the area and could create some really interesting scenarios.
Well, you could write a fanfic where there's a new villain in town who has a personal vendetta against the Hawaii Five - 0 team. This villain is using high - tech gadgets to commit crimes and the team has to figure out how to stop him. Or perhaps a fanfic that takes place during a big festival in Hawaii and there are a series of crimes that seem related to the event. It could also be interesting to write about a time - travel scenario where a member of the team goes back in time and has to make sure certain events happen to prevent a future disaster.
A plot could revolve around a character from one show being framed for a crime, and the other team has to step in to prove their innocence. For example, a member of the Five - 0 team is wrongly accused of stealing military secrets, and the NCIS Hawaii team uses their resources to dig deeper and find the real culprit. This could lead to some great character interactions as they learn to work together.
One idea could be a crossover with 'Magnum P.I.'. The characters from 'Hawaii Five 0' could team up with Magnum to solve a crime that spans across different parts of Hawaii. Maybe it involves a smuggling ring that has connections to both the military and local crime syndicates.
One interesting concept could be the merging of different storylines from 'Hawaii Five - O' with other shows or universes. For example, a crossover with a crime - solving show from a different era might bring in new detective techniques and character dynamics. Another concept could be the introduction of new characters into the 'Hawaii Five - O' world through the crossover, which can create fresh conflicts and relationships. It might also involve exploring different locations that are not typically associated with 'Hawaii Five - O' in a crossover scenario.
A possible plot could involve a missing person who has a connection to both Hawaii and LA's military. Hawaii Five - 0 starts the search in Hawaii and discovers that the person was last seen with some individuals who are under NCIS LA's surveillance. This leads to the two teams collaborating. They face many obstacles along the way, like interference from some powerful and shadowy organizations who don't want the person to be found.
One idea could be that the teams are brought together to solve a case involving a military - related crime that has ties to Hawaii. Maybe a stolen military weapon is being sold on the black market there. The characters from Hawaii Five - 0 can provide local knowledge and connections, while the NCIS agents bring their expertise in military investigations. Another idea is that a Navy officer goes missing in Hawaii and both teams have to work together to find him. They might initially have some clashes in their working styles but eventually learn from each other.
One idea could be that a case in Hawaii has connections to a national security threat that NCIS is already investigating. For example, a suspected terrorist cell in Hawaii might be linked to a larger international network that NCIS has been tracking. Agents from both teams could collaborate, with the Hawaii Five 0 team providing local knowledge and the NCIS agents bringing in their expertise on international threats and military - related matters.
Perhaps Steve gets hurt during an underwater mission. He could be attacked by some sort of sea creature or caught in a dangerous underwater current. His team would then have to deal with his absence and also figure out how to complete the mission without him. Meanwhile, Steve is in the hospital, frustrated at not being able to help, and has to rely on his mental strength to stay positive during his recovery.
A more emotional plot could be Kono dealing with the fear and excitement of becoming a mother while also being in a high - stress job. She could be worried about how her child will grow up with her being in a dangerous line of work, and she has to balance her career and motherhood dreams.
One idea could be that a case starts in Hawaii and has connections to Los Angeles. The teams from both shows have to collaborate. Maybe a criminal organization is operating in both locations and they are smuggling some high - tech weapons. The characters from Hawaii Five 0 like Steve McGarrett could team up with the NCIS LA agents like G. Callen to take down the bad guys.