This was the beginning. In this episode the three Halliwell sisters, Prue, Piper, and Phoebe , were brought to their grandmother's house to live. It had been in their family for generations
Phoebe finds herself constantly saving the life of her new boyfriend when it's revealed that she has altered destiny which will ultimately end in her death. To put the course of destiny right, Piper uses a time travelling Warlock's power