While running a bath (probably to wash all that Chinese stone dust off) Lara admires the Dagger of Xian. But she's not the only one who likes it. Warned by the burglar alarm going off she sticks the dagger in her wrap and jumps up...
Well, you thought the adventure was over. Seems some bad buys have come to pay you a visit - or maybe they just wanted to use your obstacle course. Either way, they're trespassing so use the Gun Cabinet Key on the lock by your bed to arm yourself then go start eliminating the bad guys. Do pick up everything from the cupboard - these guys haven't got much spare ammo or medkits. When you've cleaned up the house head outside and clean up the yard. It's best to leave through the back door unless you like big reception committees.
Find anyone lurking in the shadows by eliminating the shadows with some flares. You'll eventually kill the boss then return to your house for a nice hot shower.