Hanai: The Academy

Having been physically thrown out of her New York martial arts school, professional MMA fighter Delilah Gray is in exile at a depressingly cheery chain gym when she is suddenly presented with the opportunity to train at the world famous Hanai Academy, on Oahu, Hawaii.
Thrown in with a roster of elite fighters Delilah is eager to lose herself in the routine, but on her first day she learns that the brilliant female fighter who last occupied her room has gone missing and is presumed dead.
Trying to maintain focus, Delilah tries to shake off growing hyper vigilance, but the mystery of the student's murder intervenes. Forced into shedding familiar comfort zones, Delilah decides to use the skills that she has learned in the cage to stop this killer for good.