What we should present in defence?
Although this answer comes too late for OP, it may help others. If it is permitted at your institution, attend defense presentations of others before you must prepare your own.  As others have said in comments or answers, thesis and dissertation defenses are highly variable and depend on the customs of the country, the institution, and even the individual department.  Very best is to attend presentations of students whose committees are chaired by your own committee chair.
If you aren't able to attend a defense or two, try to talk to one or two people who successfully defended recently.
In either case, take notes, plan your defense, then review your plan with your advisor or committee chair.  They'll appreciate that much more than an open-ended &quot;What shall I do?&quot; type question.
A word of comfort: Your advisor or chair should never let you reach the stage of defending unless you are ready.  I know there are exceptions to that general rule, but your advisor wants you to succeed, not only for yourself, but also because an advisor looks bad when students fail.