Christy convinces herself that everything is fine even though her family is basically homeless. Surprisingly, Bonnie is the one who tries to bring her back to reality.
Randall and William take a road trip to Memphis, where Randall learns about his biological father's past.
The team suspects Kate's niece and her friend were kidnapped by an online predator involved in sex trafficking and race to find them before they are hurt.
While Magnum and Higgins reunite and work the case of a construction worker's tragic death, TC and Shammy get skyjacked by a pair of drug runners posing as tourists.
McGarrett helps his sister spy on her shady neighbors; a ride-share driver and his passenger are murdered; the team teases the youngest members when Junior escorts Tani to a wedding.