All he did was unlock a safe... And now the chase is on!

Saru is a talented young locksmith who unlocks any kind of lock. He is, however, a complete fool when it comes to women. One day a girl Mayumi asks him to open a safe full of stolen money. Knowing nothing about it, Saru takes the money briefcase with Mayumi and finds himself with yakuza gangsters and also police in hot pursuit.