background
bar
behind
black
border
cage
captive
cell
chain
concept
crime
criminal
dark
despair
escape
fear
fence
freedom
grid
grunge
hand
holding
hostage
human
iron
jail
justice
law
lonely
male
man
mesh
metal
net
people
person
police
prison
prisoner
protect
punishment
restriction
retro
safety
security
steel
vintage
violence
wire
wrist